To be Dirty and or Grimy usually due to poor personal hygiene via not showering , cleaning yourself, etc.
by LaurenIsGreasyGross September 25, 2018

Dude 1: “I saw you go home with jessica after the bar last night!”
Dude 2: “Yeah bro she let me give her a greasy railroad on that fucked up smile!”
Dude 2: “Yeah bro she let me give her a greasy railroad on that fucked up smile!”
by MFE.51101 October 5, 2021

Is when you look at the girls beside you in class and see there greasy ass hair and face. Makes you so sick that you feel like you might die. It's when someone is so gross you can literally see the krust on them.
damn that bitch is greasy
by potatofarmer420 April 17, 2019

To stick your dick in a pussy and after you fuck pull it out with all the cum and pussy juice on it.
by Rebel2012 July 18, 2020

When your friend is banging a special girl. That's licking a window, and the oil from her nose is smearing on the window.
The other day while toby was banging out Tabitha, on the bus it was totally creating a "greasy window".
by Zack89 April 23, 2018

by Kenzo_ballin384 December 29, 2021

Any man who is very dirty in appearance. He usually dresses slovenly and always drives a pick-up truck that is at least 30 years old.
by Mark 18 May 21, 2007
