Greasemonkey 

Cool extension for firefox. Let's you run user scripts, that modify how a web page acts.

I use Greasemonkey in Youtube, I use a script that runs vids in HD automaticly.

Greasemonkey by TheChosenBoy February 12, 2009

greasemonkey 

Someone who goes in and gets things done. A finisher. A closer. An ace in the hole.

Yo you just paid off that bouncer? Way to take care of business greasemonkey.

greasemonkey by tha h00tman December 8, 2011

Greasemonkey 3 way 

- when a husband and wife (or couple) sucks up to, flirts with, or fawns over the local auto mechanic to encourage better customer service, favors or discounts

- any effort utilizing gifts, compliments, or flirting by 2 people to encourage an auto mechanic to provide preferential treatment to them and their cars

the phrase is often combined as a hashtag #greasemonkey3way

My '93 Ford Taurus needed a new transmission. Luckily my wife and I gave the mechanic a greasemonkey 3 way and he was willing to stay late and get it done before our trip to Chicago the next day. He rotated the tires for free, too!

Greasemonkey 3 way by The Poobah October 25, 2013

Rusty Grease Monkey 

The act of having fellatio performed on you whilst sitting in a chair or laying on a surface in which your ass is hanging off the seat and simultaneously taking a creamy “peanut butter-esque” bowel excretion that can be caught in hand by the performer of fellatio, the feces are then used as grease to finish you off with a hot hand jibber and blow your white goblins all over your navel.

“That chick Stacey has major daddy issues, I bet she would give one hell of a rusty grease monkey.”

Rusty Grease Monkey by Trebeks_mustache August 2, 2019

grease monkey 

mechanic, or mechanically minded person

I got the grease monkey to fix my car

grease monkey by bobbo June 6, 2003

grassmonkey 

Someone who daily life consist of smoking weed.

Jose is a grassmonkey!

grassmonkey by Ironlvlonkey July 7, 2011

grease monkey 

A Mechanic

grease monkey by Ferg June 30, 2003