to defriend someone on Facebook
Man, if Darryl posts one more hipstamatic picture of his stupid kid, I'm going to have to deef him.
by section111 October 12, 2011
short for "default". Used to refer to one's profile pic/display pic on a social networking site
Sweet deef, dude!
by llllllllllllllllllllllll May 08, 2009
The process of farting out of your dickhole. Like Queefing, but with your dickhole. A deef does not smell like fish, like a queef, but like fresh spring flowers spewn accross a medow with bunnys. A deef tends to sound like a gunshot, and priests and african americans are alergic to them.
Yesterday i let out the craziest deef in church, the priest threw up on the alter, i think he was a black.
by karatychopper August 30, 2010
Making a "queef" style noise with your penis. Involves getting the air in your urinary tract to form a vacuum - letting the air out with a PRRRRRUITT-sound.
Lol, Steffen just deefed!
by Deefmaster November 06, 2008
An incredibly noisy and smelly poop, mostly dropped at the exact time someone else wants to use that specific toilet.
I thought I heard the Fourth of July firework show start two hours early, but then I realized David was just taking a massive deef.

That chinese food from the end of semester dinner had our entire suite dropping deefs all weekend long.
by Bossjan Nachbar July 01, 2011
When flatulence is expunged from the male urethra following penetration. I.e. dick fart.
Oh lord i just deefed so hard it smells like dick.
by Walker Morgan December 28, 2010
Short for defective. Can be used for a multitude of things, from situations that have gone wrong, to things that have broken, to an ugly girls face.
"Dude, you straight deefed that bowl"
"Dude, I was going to smash, but that chicks face was straight deefed."
"Dude, if I fart now, I'm straight going to deef my pants"
by Sog Man April 15, 2010
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