With origins from Halo 2 matchmaking, "Where dey at" was initially a slurred headset calling to teamates of "where are the players of the opposite team at". The term eventually evolved into a taunt statement upon headshot, betrayal, assasination, and sticky merkings.
Opposing Player X: (stands foolishly in coridoor underneath Lockout busy aiming w/sniper)

Me:(jumps down from behind and assasinates w/shotty.Where Dey At?(in direction of dead body waiting to respawn)
by gunsNalcohol September 27, 2007
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From a Latin phrase meaning "the work of God." The informal name of The Personal Prelature of the Holy Cross and Opus Dei. It is a very conservative Roman Catholic lay organization organized in 1928, whose members have a strong dedication to the Vatican.
He is a Opus Dei from Vatican City
by Bernardlee May 26, 2006
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DCs #1 school for sports... and posers. This school has more tools than a home depot! The kids there r OBSESSED with their school (and themselves). Yes... theyre good at sports but theyr also good at being insensitive douche bags. They hate any other DC school and ANY other definition of mater dei on this site that is sayin good things was written by a mater dei kid (or some dumb blonde from some public school).
Mater Dei Kid- Im sooooooo awesome!!! LAAAAAX!!!!
Dumb-Ass Blonde- Hhaha! I knoooow!!!! i sweat u!!!
Normal Kid: Not really.
by nikehitops March 1, 2011
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the only question to be asked when searching for a BNH (butt naked hoe)
bird dick: ay bro where dey at?

bird dick 2.0: i dont know mane im tryna find em

bird dick 3.0: thaswassup
by bdmane October 20, 2009
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a hot,pretty smart blonde who is good at soccer and lacrosse her best friends are lauren helen and becca. she is kind and reliable she is a good friend oh and EXTREMELY HOT!!! she has a nice body!! i <3 her ass
by summerhelenlaurenbecca April 25, 2011
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a term used in reference to the cincinnati bengals. a battle cry of sorts often used by fans at paul brown stadium. also a cincinnati beer produced when the bengals are good, so that means there hasn't been a great deal of "who-dey" beer brewed lately
who-dey think gonna beat them bengals... nobody!
by troy November 4, 2003
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A school in Santa Ana, California that is ridiculously good at sports. IT also provides a great education to those that want it. Also unlike that gay school called Sage Hill it does not cost 19 grand a year and there are not as many stuck up bitches that get escalades and porsches for their first cars.
Guy 1: We play Mater Dei at football tommorow
Guy 2: wow were boned
by materdeirules March 30, 2005
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