Kevin Connolly -- 'Johnny Bananas' Lawsuit is a Heap of Monkey Crap

Kevin Connolly thinks the MTV star who's suing "Entourage" is a frickin' moron -- claiming there's no way in hell the show could've ever stolen the name Johnny Bananas from him.

Connolly was leaving Dan Tana's in Hollywood last night ... when he told us, "I think he's crazy ... he's bananas if he thinks he's gonna get the money."

TMZ broke the story ... former "Real World" star Johnny Devenanzio recently filed a lawsuit against the people behind "Entourage" ... claiming he owns the rights to the name Johnny Bananas, because he used the nickname during his stint on MTV.

Devenanzio claims "Entourage" was blatantly attempting to "capitalize on the name recognition" when they ran a storyline in which Johnny Drama voices a cartoon monkey named Johnny Bananas.

Drama.