vulgar slang A penis. "Beaver Cleaver" was a character on the 1950s TV show Leave It to Beaver. "Beaver" is also a slang term for the vagina. Hey, I don't want to see your beaver-cleaver—pull up your pants!
beaver-cleaver
n. the penis. (see also beaver. Also a play on Beaver Cleaver the lead character in the old television show, Leave It to Beaver.) He seemed proud of his beaver-cleaver, as he called it. No one knew why.