the act of getting a girl drunk and bringing her back to your hotel room, where 4-6 of your friends are waiting in the bathroom. Proceed to slam her from behind, (its key to make sure she cant see your face) and when you are about finished, you call in the next guy. This secret train continues until all 4-6 are finished. When the caboose is done, u go back to the girl, fake an orgasm, and your done with her. Make sure she leaves the hotel room quick, before she wants to use the bathroom.
After the game me and half the team are planning on getting an underground railroad going on some skank from the club, you want in?
by Big Matty Johnson October 24, 2007
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A non-commercialised non-profit Rap scene. A style of Australian rap music where rappers choose not to 'sell out' to Record Conpanies & instead produce their own Recordings whilst maintaining other forms of financial income.
Guy a) bro, u know any good Underground Aussie Hip Hop beats?

Guy b) yeah sus out #undergroundaussiehiphop on Instagram! Google Celebrity Pete Laan is a fan of that shit
by Scriptures April 24, 2017
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Secret Underground Rave Parties are the best parties to have. They are underground somewhere, usually have techno, glowsticks, & alcohol involved. Since these parties are awesome & secretative, you must be on the list, know someone there, or be cool. Usually there might be a couple rockstars involved doing cocaine in the back.
Guy: Hey, you want to go to a Secret Underground Rave Party with my Friday night?
Girl: Uhh, you got invited?
Guy: I'm bringing glow sticks.
Girl: Ah.
by KellyKerosene February 14, 2009
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an Underground/Most Wanted Fanboy is a species of people usually found on Need for Speed fanpage,

But commonly wasting their time nonstop complaining about NFS Underground 1 & 2 or NFS Most Wanted 2005 Remastered.

The characteristic features are:

- Stuck on 2005

- Cringe
I love new Need for Speed games but i can't stand these Underground/Most Wanted Fanboy comments.
by duckyboo October 17, 2022
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Asian: Hing hong shong chein

*Whips out Samarai sword*
Dog: Screaming intensifies
Asians: enjoys dog soup
Zack: "you going basketball training?"
David: "Nah I'm at the Underground dog torture chamber."
by RASHEEDFELLINARESERVOIR.EXE October 2, 2019
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