A mocksman is a person who is
skilled in accurate mocking, using insults, such as with a clever "your mom"
joke, to shoot down
people with stupid ideas, or unwitty comments.
Person 1: "Oh man, I had sex with your mom"
Person 2: "I'd
never have sex with your mother. Nothing good ever comes out of her!"
Person 3: "
Check out the mocksmanship on that
guy!"