As far as urban slang, the definition is "to show off." Used by many rappers, most notable Ice Cube and the Geto Boys. Originated in the urban community, and has been used for quite some time.
"...no flexin', didn't even look in the nearest direction as I ran the intersection. (This is said because Ice is trying to get away from some people who tried to kill him the other day In the song, of course
)" -Ice Cube, "It Was a Good Day"
Three-digit code used by police to identify a robbery. Not nearly as popular among early 90s West Coast gangster rappers as 187, which was used by the LAPD to identify a homicide.
"Tried to set me up for a two-eleven, turned around and got caught up in a one-eight-seven." -Dr. Dre, "Let Me Ride"
A term sometimes used interchangeably with Sucka MC, used to describe a fake or 'posing' person. Q-Tip of A Tribe Called Quest did an entire song revolving around this term.
"I throw the sucka in the front for the ones that front." -A Tribe Called Quest, "Sucka Nigga"
Term recently coined by Mos Def, now used freqently to describe the degeneration of hip-hop from an art form and expressive outlet to glorified criminalistic behavior and corporate domination of a once-underground phenomenon, i.e. De La Soul or KRS-One, who rap about every day events and important issues vs. 50 Cent or Juvenile (By-products of The Rape Over), who rap about murder, theft and what they buy with their millions of dollars (For example, 50 Cent's newest album is titled <i>The Massacre</i>).
"We over-do it add the fire and explosion to it/We're so confused so we run rap music
MTV is runnin this rap shit/Viacom is runnin this rap shit/AOL and Time Warner runnin this rap shit/We poke out the ashes for a chance to cash in
Cocaine, is runnin this rap shit/Hennessey, is runnin this rap shit..." -Mos Def, "The Rape Over"
Death. The afterlife. The world beyond this mortal coil. Term used by pirates to define death.
"That landlubber visited Davy Jones' Locker long ago, matey."
The title of a Slick Rick song, the phrase was coined by Ricky D himself, used to describe the reluctance men should take toward women when getting involved with them. After the popularity of Rick's song with the same title, this phrase became popular.
"Treat her like a prostitute, don't treat the girly well until you're sure it's sweet." -Slick Rick, "Treat Her Like a Prostitute"