Knock Knock! Who's There? Figs Figs who? Figs the doorbell, it's broken!
Knock Knock! Who's there? Justin Justin who? Justin time for dinner!
Knock Knock! Who's there? Zany Zany who? Zany body home?
Knock knock. Who's there? FBI. FB… We are asking the questions here!
Knock knock. Who's there? Urine. Urine who? Urine trouble if you don't open the door.
Knock-Knock Who is there? A long penis with a naked head. Come in please we were waiting for you.
Yo mama so nasty that when she goes to the universal studios children follow her shouting "Shrek! Shrek!"
Knock, knock. Who's there? Nobel. Nobel who? No bell, I knock.
Knock-knock Who's there? Fuck. Fuck who? You.
Knock knock? Who's there? Hitler! Hitler who? You Know, the man who kills jews.