Human 1 - I have to go do laundry.
Human 2 - Your mom has to go do laundry!
Human 1 - Twice, naked.
*in a game of DotA*
Lion: **** your mom I will pwn u!!!!
Lina: O RLY?
*Laguna Blade*
Lina Inverse has just pawned Lion's head for an extra 135 gold!
Lina Inverse has drew first blood! (+200 gold)
Lion the Demon Witch(level 7) has fallen.
Lina: HA! IN YOUR MOM'S FACE!!
What have I created....
I like it when you say to little kids "You're short." and the best reply they can think of is "Your mum!". I both metaphorically and literally pissed myself laughing when that happened.
Brian: "If I remember correctly, this is the Physics Department."
Chris: "That would explain all the gravity."
Your mom and your face are both excellent interjections.