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61.
BC
Border Collie.
A medium-sized (average 45 lbs.) dog developed over many years in Scotland for herding sheep. Widely recognized as the most intelligent of dog breeds, Border Collies excel as working dogs, but also dominate in sporting competitions like agility, flyball and frisbee.

Border Collies are typically black and white, but many colors and combinations exist. A BC may have a long (rough) coat, or a short (smooth) coat. Appearance is secondary to intelligence, temperament and working ability in determining if a dog is a "real" Border Collie.

(BCs have recently been inducted into the American Kennel Club for conformation showing. Many BC lovers oppose this because Border Collies have traditionally been bred for working ability with little regard for their appearance. BC advocates fear the breed will lose its working ability and intelligence if bred primarily for appearance.)
Jock, herding the kids around the living room table, is the quintessential BC!
by Alex J. Todd October 05, 2005
 
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
 
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
 
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.
(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
 
6.
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
 
7.
Before Cellphones.
Now any event before 1985 can be considered B.C.
by frankiewashcloth March 27, 2010