51/50 

police code meaning crazy and violent. often used as slang meaning the same.

cop: "we have a 51/50 here. im gonna need backup."

----------
person: "that dude's a fucking 51/50. dont mess with him."

51/50 by Kennedi Greene August 27, 2007

51 normal 

"51 normal" and associated phrases, like "55" refer to selections from an automated drinks dispenser

A 51 normal is a cappuccino, without sugar, normal strength.
A 55 is a choco-milk

Randeroo: "Get me a 51 normal"
Mullet: "Sure"

51 normal by Jabes July 22, 2004

51 cent 

wannabe 50 cent

zack is a loser

51 cent by HELLOOO June 16, 2003

51 flavors of retarded 

Really, Really retarded

Bob: Hey Joe, did you do that english assignment?
Joe: yeah, that thing was 51 flavors of retarded

51 flavors of retarded by Vice President November 18, 2006

51 percent 

A reference to conservatives or Republicans, which alludes to the 2004 elections, in which 51 percent of the nation elected George Bush. Ironically many of those middle and lower class rural people who voted for him stand to lose money and other benefits as a result of his new Social Security plan.

the 51 percent supports essentially reversing Roe vs. Wade

51 percent by dmby.com May 13, 2005

51%'er

Those who will only work just enough to get the task done or to maintain their job.

I bust my ass every day mechanically separating these chickens while the 51%'er fucks around all day. I'm gonna shove that bastard in the meat grinder after I eat my sack lunch grandma packed for me. I hope like hell it ain't braunschweiger and cheese again!

deadbeat lazy unmotivated dead weight

51%'er by K. Hartnell June 1, 2009

51 Shortfalls 

An infusion of sounds, lyrics and presence that will haunt your wet dreams for decades.

Her body still danced to the echoing beats in her brain, her ears twitched craving more, and her panties were wetter than niagra.. It was clear she had been to 51 Shortfalls. eargasm genius fantasmic

51 Shortfalls by zombietesla26 November 10, 2010