This is slang that originated with American soldiers during World War II. Many US troops were armed with their fully automatic equivalent of the STEN gun, the M3 submachine gun which, because of its resemblance to the mechanic’s tool was called the ‘grease gun’. With the slightly macabre humour prevalent amongst those who are in combat, enemy troops killed by this weapon were referred to as having been ‘greased’.
It quickly came to mean killed by multiple bullet wounds from any type of machine gun. It was during the Vietnam War, however, that its use expanded and increased quite dramatically until it became used to describe any death in action against the enemy.
There is now some evidence to suggest that the word greased is being used to describe any violent death, even where this is not in combat and when it may even be an accident.
“Tommy got greased yesterday! Fucking great pallet of bricks fell on him at the building site!”
by AKACroatalin October 16, 2016
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a threat in prison that is effective under most circumstances.
It refers to anal rape, and when one says "no grease," or "I'ma hit you with no grease," this means that they do not intend to use any sort of lubrication during the anal rape. One of the scaries things someone can say to you in jail.
"Bitch you better toss my salad before i hit you with no grease!"
by J-ho's pimp August 20, 2006
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When you are in a situation that is unfortunate, hard to get out of, or a situation when you are taken advantage of. Exactly the same as getting screwed, shafted, or fucked over. This term is more popular in Canada than the United States.

Related to: Greasy, Greasing, Grease
Person 1: "Hey man I just talked to that guy from the car dealership, and he said I can't have my deposit back"

Person 2: "Yeah man, sounds like he Greased you"
by BillyDaYak September 02, 2018
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To be greased means to be killed. Originally it meant to be killed by multiple bullet wounds from a weapon fired on full automatic but gradually its use extended, particularly during the Vietnam War, until it was used to describe any death caused by enemy action.

The expression originated from American troops of the Second World War who were armed with the M3 submachine gun. Since the M3's nickname was 'grease gun', supposedly from its resemblance to the mechanics tool, enemy troops killed by the M3 were soon referred to as having been greased.
Had some luck out in the boonies today!
How's that?
Nine of Uncle Ho's finest goofin' off in a waterhole, twelve M16s greased their asses real good!
Number One!
by Croatalin November 19, 2013
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A movie that is amazing that was shot in the late 1970s and stars Olivia Newton-John and John Travolta.
Grease is still the fucking word...
by mr.tnt March 16, 2005
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