Dennis Van Tine/STAR MAX/IPx New Jersey Gov. Chris Christie called Sen. Ted Cruz's speech at the Republican National Convention “awful” and “selfish.”

Talk about a below-the-belt shot!

The head of Ted Cruz’s presidential campaign said that New Jersey Gov. Chris Christie “turned over his political testicles long ago.”

In an interview with a Philadelphia radio station, Jeff Roe was asked about criticism of the Texas senator’s Republican National Convention address. Cruz was resoundingly booed after he declined to endorse Republican presidential nominee Donald Trump in the speech. He also took heat from Trump surrogates, including Christie, who called the speech “awful” and “selfish.”

“That guy turned over his political testicles long ago,” Jeff Roe said on the “Chris Stigall Show” ― which, thanks to BuzzFeed, you can listen to below. “I don’t take what he has to say with any meaning. You know, he embarrassed himself pretty quickly in this.”

Cruz defended his comments in a meeting with Texas Republicans.

“In that speech last night I did not say a single negative word about Donald Trump,” he said. “I don’t intend to say negative things ... what I said last night is what I believe.”

Editor’s note: Donald Trump regularly incites political violence and is a serial liar, rampant xenophobe, racist, misogynist and birther who has repeatedly pledged to ban all Muslims ― 1.6 billion members of an entire religion ― from entering the U.S.