A colloquial expression, usually used in (but not limited to) Australia and similar/English speaking nations, for the process of defecation. Generally associated with humans and other humanoids, this phrase can be also be used to describe the defecation procedure of other animals eg. the family pet. A similar, slightly less descriptive version is the phrase back one out. Note that the word greaser has a wide range of usage in other contexts.
I really need to "back out a big greaser"
Watch where you step mate, I just watched Fido "back out a big greaser"
When I wake up I usually need to "back one out".
by pc0000001 June 28, 2010
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An adolescent boy who rides around on his scooter and attempts to pick up girls. Usually wearing tight jeans and a ridiculous helmet. Can some times be found in groups or “scoot packs”, they gain confidence in numbers. But even in numbers they are usually denied.
Those scooter greasers have driven by five times.
Those are some shitty bikes, they must be scooter greasers.
by Seamon-ster July 16, 2018
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A group of people in Boston that are greasers that formed a group in 1993
Wow i sure love those Boston greasers
by MR man mo February 15, 2021
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Someone who thinks they're cool, but really aren't. They usually use cancerous memes (i.e. dabbing, hairlines, etc.). They like music genres such as pop, rap, and trap. They try to be the "cool one" or "bad boy" Their age ranges from preteen to teen, but most are preteen middleschoolers. They are idiots and they're everywhere. They are a waste of oxygen and make the human race worse. They I feel sad for everyone who has to deal with them.
Dan: "Yo guys check out my new fidget spinner!"
Bob: "Bro fight me for it!"
Joe: "God, you both are idiotic greaser lightnings"
by Lolfiredude June 20, 2017
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Those beans I ate last night gave me mad air greaser's!!
by tzfrompc February 9, 2010
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The act of slightly warming up a hot dog to let a little grease out then proceed To put it up ones ass
Dude mike was so drunk last night I convinced him to do a greaser
by Acid raves March 24, 2019
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Here’s an insider definition: A Greaser is a person who represents the youths of the late 1940’s- early 1960’s who are known for their greased hair, black leather jackets, and rebellious attitudes.

Greasers wear their hair in styles such as the Pompadour, Jelly Roll, Slick Back, and various others. They’re also known for their sporting of tight blue jeans, white or black shirts, medallions, and engineer boots or black and white sneakers.

Greasers have a passion for vintage American muscle cars, and listen to music by people like Elvis Presley, Johnny Cash, Jerry Lee Lewis and others. They love the ladies, milkshakes, burgers, rumbling (Greaser lingo for fighting with the other gangs) and did I mention the ladies?

Greasers are some of the most awesome, cool, badass, streetwise and greasy guys around, and no-one can compare to our levels of badassery.
Pfff, look at those Greasers over there, flirtin’ and drinkin’ milkshakes. Hope we don’t get into a rumble with ‘em!”
by Billy Singe August 27, 2019
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