Do you know a guy who is always making your mom jokes? As in you say "blah blah blah" and he says "You mom blah blah blah." Well I certainly do know that guy.

The best "your mom" joke though came from a couple Tom and I know. I think the setup was the dude had cut himself, and then bandaged it up.

Husband: It's not bleeding anymore.
Wife: Your mom's not bleeding anymore.

It was funny, and true.