Designated Black Friend. In every group of white friends there's always the signature kid that acts like a nigg. Includes phrases such as, "Shoo gurl", "sum of dems", "hell nah", etc.
White friend: Gimme sum o dat fried chicken, nicca.
Other white friend: You're such a DBF.
by DBFmasters March 7, 2011
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When you're at a party, and that ugly guy won't stop hitting on you, the DBF would say, "dude, she's not into you, walk away." If that doesn't work, you slap that ho.

"Amanda, you're our DBF"
by roshondalala jones February 14, 2015
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Double butt fucking... having your dick in one asshole while the other ass rubs your shaft.
by DBFer king December 12, 2009
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Dumb Bitch Factor

Taking into account limited decision making capibility of some women.
Dont forget the DBF when assigning her important tasks.
by modfear February 29, 2008
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DBFS is an internet abbreviation for "don't be fucking stupid." Its primary use is to admonish someone for a stupid question or their lame behavior.

DBFS is often preceded by a hashtag (regardless of medium): #dbfs
Allison: What are you doing on Sunday night?
Liz: It's Sunday, we're watching "Game of Thrones." DBFS!
Allison: I haven't started watching it. What is it about?
Liz: Winter is coming. Just watch it. DBFS!
by dbfsjoe September 27, 2013
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-So then she took off her shirt.
-Big dbf.
by Biggus Dickus January 9, 2005
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