Underground Pornstar 

Some super hot babe that you find posing naked on the interweb. She must be superior to the common pornstar.

Yo Younger, come check out Sweet Adri, she is definitly my new favorite Underground Pornstar.

Underground Pornstar by Cheech's ball fro December 2, 2009

Underground Rap 

1. Artist who paint pictures with words that are commonly rejected by Commercial Rap listeners. Usually they have an Unorthadox rap style or choose not to rap about the same things main stream artist do.

2. Genuine rap that is real and uncut. Often found in cyphers by actually freestyle artist that don't rap for the money, just for someone to hear a lyric.

3. Some rap music you just might have to do your homework on.

1. Underground rap is usually found with artist like- Tyler The Creator, Lupe Fiasco, sometimes B.o.B, Fort Minor, and other various artist who branch away from the commercial rap style.

2. Found with a group of people who just rap for the hell of it, Underground rap as in: found in the subways of New york etc.

3. Guy 1-"Bro you heard of Tyler the Creator? He worships the Devil"

Guy2- "That's that underground rap bro, go do your homework and find out what the lyrics mean. I suggest rapgenius.com"

Underground Rap by Underground Rap Genius May 24, 2012

Underground RailRoad 

Two or more black males having sex with a black female, whilst in a basement.

Black_Guy1: Yo, me & Chanel had an Underground RailRoad last night!

Black_Guy2: Tight, dawg!

Underground RailRoad by NitroFight53 August 22, 2010

underground bastard 

One who lives in the shadows, leading a life of art, mystery and intrigue.

You see that ill graffiti? That's some sick underground bastard shit.

underground bastard by ShystyOne July 1, 2006

Underground Railroad 

Getting a blowjob from a black girl on a subway.

Latisha gave me the underground railroad last night.

Underground Railroad by blakem January 3, 2007

Underground Pipe 

verb. : A euphemism for the brown surprise, or butt sex.

There were alot of guys trying to lay underground pipe in the Manhole bathroom on Halsted.

Underground Pipe by FFJeroni January 20, 2011

Underground yuppie 

A young urban professional (yuppie) who deals in illegal or unsavory business; typically drug dealers, arms dealers, organized criminals, murderers for hire, gang members, pimps or prostitutes, thieves, etc.

Scarface was the paradigm underground yuppie climbing the corruption ladder, using the piss-ants around him as wrungs.

Underground yuppie by Snowflake 2.0 August 5, 2012