Crazy Joe Davola
"I know you badmouthed me to the execs at NBC, put the kibosh on my deal. Now I'm gonna put the kibosh on you. You know I've kiboshed before, and I will kibosh again." Crazy Joe Davola episode 4.9:The Opera
Crazy Joe Davola is exactly as his name suggests,CRAZY.A martial arts expert with a fondness for show tunes, this character dated Elaine (whom he calls "nedda") in Seinfeld season 4, until he went crazy when she failed to get him tickets for Pagliacci.
He claimed to have hair on his tongue and he blamed Jerry Seinfeld for putting it there. Tried to ruin Jerry's show by sitting in the audience and shouting. Kicked Cosmo Kramer in the head.