2. An insult which defines the insulter as a person with a very negative attitude toward sexual behaviour, esp. american.
1. (S)He licked and sucked the guy's cock until he nearly fainted with pleasure.
2. He was raised in the bible belt, having the far-righteous christian belief that any sexual act other than the missionary position is not only his business, but wrong, and so, when confronted by a person he didn't like, called them a cocksucker.