"Late Show" host Stephen Colbert is facing backlash for a joke he made about President Donald Trump on Monday night that many are calling "homophobic."

During his opening monologue, Colbert went off on Trump over the President's treatment of CBS News' John Dickerson, who saw an interview with Trump abruptly ended when he asked about the President's unproven claims that then-President Obama had wiretapped Trump and members of his campaign. As Dickerson and Colbert are both CBS employees, Colbert felt it his duty to say the things Dickerson himself could not.

"Sir, you attract more skinheads than free Rogaine," Colbert said near the end of the insult-laden rant. "You have more people marching against you than cancer. You talk like a sign language gorilla that got hit in the head. In fact, the only thing your mouth is good for is being Vladimir Putin's c–k holster." The final remark has drawn the internet's ire, with viewers taking to social media to declare Colbert is homophobic.The hashtag #FireColbert began spreading around Twitter, along with calls for people to boycott sponsors of the late-night show.

CBS did not immediately respond to Variety's request for comment.

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17 PHOTOS Stephen Colbert out and about See Gallery Stephen Colbert out and about NEW YORK, NY - MAY 01: Stephen Colbert attends 'Rei Kawakubo/Commes Des Garcons: Art of the In-Between' at Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Taylor Hill/FilmMagic)) NEW YORK, NY - MAY 01: Stephen Colbert (L) and Evelyn McGee attend the 'Rei Kawakubo/Comme des Garcons: Art Of The In-Between' Costume Institute Gala at Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Dia Dipasupil/Getty Images For Entertainment Weekly) MONTCLAIR, NJ - APRIL 30: Stephen Colbert and John Turturro arrive at Conversation Series Discussion at the Montclair Film Festival 2017 Day Three on April 30, 2017 in Montclair, New Jersey. (Photo by Dave Kotinsky/Getty Images for Montclair Film Festival) MONTCLAIR, NJ - APRIL 28: Stephen Colbert and Dolores Huerta arrive at Montclair Film Festival 2017 Opening Night on April 28, 2017 in Montclair, New Jersey. (Photo by Dave Kotinsky/Getty Images for Montclair Film Festival) NEW YORK - APRIL 25: The Late Show with Stephen Colbert and guest John Legend, Kelly Osbourne, Dr John during Tuesday's 4/25/20 show. (Photo by Scott Kowalchyk/CBS via Getty Images) NEW YORK - APRIL 17: The Late Show with Stephen Colbert during Monday's 04/17/17 show in New York. (Photo by Scott Kowalchyk/CBS via Getty Images) NEW YORK - APRIL 6: The Late Show with Stephen Colbert on *Thursday, April 6, 2017 Special Hybrid Episode: Jessica Lange; Bassem Youssef; Judy Gold. (Photo by Mary Kouw/CBS via Getty Images) NEW YORK, NY - APRIL 02: Evelyn McGee-Colbert and Stephen Colbert attends 'The Play That Goes Wrong' Broadway Opening Night at the Lyceum Theatre on April 2, 2017 in New York City. (Photo by Walter McBride/WireImage) NEW YORK - MARCH 27: The Late Show with Stephen Colbert airing Tuesday March 27, 2017 with Lily Tomlin & Jane Fonda; Jay Chandrasekhar; musical performance by Aimee Mann (Photo by Richard Boeth/CBS via Getty Images) NEW YORK - MARCH 31: The Late Show with Stephen Colbert airing Friday March 31, 2017 with Susan Sarandon, Joey McIntyre, Robert Klein. (Photo by Richard Boeth/CBS via Getty Images) NEW YORK - MARCH 21: The Late Show with Stephen Colbert on Tuesday, March 21, 2017 with guest Ryan Reynolds (Photo by Mary Kouw/CBS via Getty Images) NEW YORK - MARCH 14: The Late Show with Stephen Colbert airing Tuesday, March 14, 2017 with Neil deGrasse Tyson and Todd Barry. (Photo by Timothy Kuratek/CBS via Getty Images) NEW YORK - MARCH 13: The Late Show with Stephen Colbert, interviews with Ewan McGregor, Finn Wittrock and musical performance by The Shins on Monday's taping in New York. Pictured left to right: Finn Wittrock and Stephen Colbert. (Photo by Michele Crowe/CBS via Getty Images) NEW YORK - MARCH 6: The Late Show with Stephen Colbert airing Monday, March 6, 2017 with Judd Apatow. (Photo by Timothy Kuratek/CBS via Getty Images) NEW YORK - MARCH 6: The Late Show with Stephen Colbert airing Monday, March 6, 2017 with Anderson Cooper, Judd Apatow and musical performance by Jidenna. (Photo by Timothy Kuratek/CBS via Getty Images) NEW YORK - FEBRUARY 28: The Late Show with Stephen Colbert airing Tuesday February 28, 2017 with Lisa Kudrow; former White House Press Secretary Josh Earnest; comedian Tony Rock. (Photo by Richard Boeth/CBS via Getty Images) NEW YORK - FEBRUARY 17: The Late Show with Stephen Colbert on Friday, Feb. 17, 2017 with guests Julie Andrews; Christina Hendricks (Photo by Mary Kouw/CBS via Getty Images) Up Next See Gallery Discover More Like This HIDE CAPTION SHOW CAPTION of SEE ALL BACK TO SLIDE

Of course, this is not the first time Colbert has been the subject of a campaign to get him pulled off the air. Back in 2014 when he was hosting "The Colbert Report" on Comedy Central, that show's official Twitter account posted a message saying, ""I am willing to show Asian community I care by introducing the Ching-Chong Ding-Dong Foundation for Sensitivity to Orientals or Whatever." The tweet was meant to satirize Washington Redskins owner Daniel Snider, who started a charity to benefit Native Americans. Many perceived the tweet as a racist assault on Asians and Asian-Americans, leading to the creation of the hashtag #CancelColbert. Colbert reveled in the controversy, however, even promoting it on future episodes of "The Colbert Report."

If and how he will respond to the current firestorm remains to be seen. Read some of the reactions to Colbert's joke below.

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