What is Your Kids?
When someone is too old to be insulted by "yo mama", simply give them "yo kids". This sends people into a towering rage, especially, if you happen to be sleeping with thier daughter.
Girlfriend's dad: I'm gonna ream yo ass!
Gumba: Your daughter! Last Tuesday when she was supposed to be shopping!
GFD: AAAAAARRRRRGGGHHHH! DIIIEE!