12" 

a single, derived from back in the day of 12 inch vinyls which typically had one song.
also 1,2 because single songs on a 12 inch vinly were easier to switch and mix on a 2-deck turnatable
nowadays it is considered normally as the first single to be released from an upcoming album and referred to as a promo track

"One two, one two, one two, one two
So you wanna start up, what we gonna tear shit up?
I said let the turntables talk for me at first
And then I should finish the rest"
-X-ecutioners "Live form the pj's"

12" by Bruce March 4, 2005

12" 

The best mix that a song can have. It is usually longer, easier to mix, and you can juggle beats from the instrumental with the main 12" mix on a pair of decks.

12" is the way to gop for good mixes and to get good crowd reactions.

12" by djscrizzle March 18, 2004

12" 

12 inch vinyl LP, Maxi or Long Play

12" by VAKI5 August 16, 2003

12" 

A big dick that can make a chicks legs tremble in fear. To hard to grip as big as a humans beings forarm.

O my gosh i fucked dis dude wit dis 12" that made me cry i couldn't resist it was just to big.

12" by Montez Robertson May 31, 2007

12 

Slang for the police or any other law enforcement.

“Told em fuck 12, fuck SWAT...”

12 by nlolhere May 28, 2020

12 

The police

Fuck 12 !

12 by Babymommma June 6, 2020