1 definition by I.Am.No.One.

QTFD

Short form for Quiet The Fuck Down. Something you say to kids who talk a lot who wont shut up.

(Bunch of kids shouting for no reason and wont calm down)
You: QUIET THE FUCK DOWN! Dumb bitches

or online to a bunch of spammers
You: QTFD Fucking Spammers!

by I.Am.No.One. June 23, 2010