51 

A joint made of 51% weed and 49% cocaine.

Hey dude let's smoke a 51.

51 by Hijodelbong September 17, 2005

51 

An alien

Area 51 = Area with aliens

Hey look there's a 51!

51 by astroboy51 September 3, 2019

51 

Combination of crack cocaine with marijuana or tobacco

Whats good bro?
Just coolin with a 51

51 by whodatjcole May 9, 2011

51 

a joint with $1 worth of weed and $5 of freebase.

why don't you roll up a 51, boo.

51 by gaa barry gary October 3, 2004

51 

A cappuccino - see 51 normal

"Get me a 51"
"Sure"

51 by Jabes July 22, 2004

51 

means victory and luck

lottery and david not being gay

51 by danny cadman April 26, 2003

51 

a very cool number which has absolutely no significance to anything.

often written on various objecs in public spaces, or at least it is among my 'circle'.

"hey, dudes, I just 51-ed that lamp-post"
"really? oh yeah, I can see it now, nice one man"

51 by cheesepie4herJboy August 19, 2009