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3.
BC
BC can stand for buttcrack or buttcheek you pick.
you're such a BC!

haha her face looks like a BC
by lalalalacolor September 15, 2009
 
1.
bc
bc is an abbreviation for the word because. it's used in msn and in short hand.
"I wasn't in school today bc i was feeling ill"
by Will 123 April 30, 2008
 
2.
BC
British Columbia- Most Western Canadian province. Also known for it's fine BC bud.
Jeremy went to BC and brought back some BC bud- the finest the world has to offer.
by Dr. Ben May 29, 2003
 
4.
BC
butt-cheeks
buttcrack
A: you're a dick
B: well you're a BC

A: Kanye west was such a BC at the VMA's
B: Yea, that was a BC move.
by aznboy247 September 15, 2009
 
5.
BC
BC=blatant chirpse

When someone says something to a member of their sexually preferred sex that is so obviously flirting. when this happens, anyone around that person normally shouts out BC.

The announcement of BC can often lead to cock blocking.
Example 1:
Guy: you look amazing (to a girl)
Mates: BC!!BC!!

Example 2:
Friend 1: (insert name) is so hot!
Friend 2: I think you should try it on.
Friend 1: I'm going to lay down a cheeky BC.
by Quinn's Resident December 29, 2009
 
6.
Before Cellphones.
Now any event before 1985 can be considered B.C.
by frankiewashcloth March 27, 2010
 
7.
(As in "Before Christ") Term occasionally used in Southern California as a synonym for "old school."
"Dat shit's so old-school it's B.C.!"
by Purple Donkey September 03, 2009