Acronym for Designated Cock Blocker. This is the most unattractive female in a group of women at a nightclub or like social gathering. Her primary purpose is to remain unintoxicated and defer all advances from would be suiters.
Also, the male counterpart is the friend who won't go home or go away when you are trying to get your freak on, as it were.

O.k., first and foremost, we have to distract the D.C.B., so we can make our move.

d.c.b. by captain cornbread July 1, 2006

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D-day

1. 6th June 1944 - When the troops invaded France in the turning point of WWII
2. When all the Charver scum of Great Britain stagger down to the the job centre to get their 'wages'. D-day is when you can find all the unemployable scum in parks with cheap cider, or bags of heroin/crack trying to have sex with 13 year old girls.

1. There is an educational film on about D-day tonight
2 Chav: Fuckin' d-day comes along get yourself some thatcher's white magic - it's the fuckin' biz an i'm off to be buzzin off my tits in a bit innit

D-day by Ali January 23, 2005

D.B.U.

D.B.U.=Defensive Back University. Nickname given to Virginia Tech by football commentators for its history of producing professional American football players at the defensive back position.

If you want to excel as a defensive back in the NFL, you'd better play college football under Bud Foster at D.B.U.

D.B.U. by TruthinessToo October 8, 2013

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