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1.
BCG
Birth Control Glasses. Generally a military term which refers to the large, blocky glasses issued to military personnel who require the use of corrective lenses.
Man, these BCGs make me look like a complete idiot.
by Nemesis April 16, 2004
 
2.
BCG
Boston Cum Guzzler (n)

Consultant slave who works tirelessly making better charts and graphs and guzzling the cum of his superiors. Sometimes also known as "Best Cum Guzzler."
Damn, Mike is such a tool; only a BCG would organize his porn on powerpoint.
by McConsultant September 09, 2011
 
3.
literally, Birth Control Glasses. The glasses issued to new recruits in the military, so called because no girl would want to have sex with men wearing these ugly, ugly glasses.
Wow, newly shaved head and BCG's. I'll never have sex with those new recruits.
by Pork King April 30, 2003
 
4.
Big Chested Girl(s)

Girls with tight bodies, usually with hot curves e.g. Melanie Iglesias but with "bigger" or above-average sized natural breasts e.g. Kelly Brook/ Lacey Banghard
Eva Amurri, Kat Dennings, Salma Hayek

"Damn n*gga! we got those B.C.G.'s up in here!!"

Girl1: I really should not run down the stairs with these things, ouch!

Girl2: Oh poor you and your B.C.G problems!
Boy: God bless that chest!!
by Gingerpuss91 April 20, 2012
 
5.
BCG
Birth Control Glasses; i.e the brown glasses issued in the US military during basic training that are so ugly and are said to be effective birth control because the opposite sex will avoid you and never do you.
OMG, look at Betty's BCG!
by Chuckybuddy September 23, 2007
 
6.
Birth Control Glasses
I've got my BCGs on- no wonder I get no play.
 
7.
These are the military glasses issued that look retarded. B.C.G. stands for Birth Control Glasses cuz when you are wearing these out in public you aint gettin no play.
Hey fool take of your B.C.G. your scaring the chicks away.
by Crash Override May 13, 2008