USA Today

After calling the Detroit Lions his team's little brother, Chicago Bears wide receiver Brandon Marshall received some pretty insulting comments from a Twitter troll but wasn't afraid to call the man out.

Things started when the Lions fan posted a picture of insulting comments he left on Instagram about Marshall and his mother (warning: NSFW language).

Instagram

Marshall responded with a tweet offering the man $5,000 to fight him in the ring. He also said that if he won, the fan would have to serve 100 hours in an orphanage.

The fan tried to get Marshall to raise the price, and the receiver didn't hesitate to respond, adding that the fan would have to apologize to his mother.

Never insult a man's mother, especially if he's a professional athlete who wants to fight you.

[Twitter, h/t Sports Illustrated]