1)To be out on the town drinking to get drunk. Can be used in this sense even before one has started drinking.
2)To get drunk.
3)To be drunk.
1)"Bro, what are we gonna do tonight?"
"I'm keen to get on the hammer!"
2)"Let's get on the hammer cuz!"
3)"You punters on the piss?"
"Yea bro. We're on the hammer tonight!"
by Dave Remillard November 29, 2007
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Joe: Hey Bill, let me use that there hammer over there

Bill: ok. here you go
by thomas546452 February 17, 2009
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a gun, heater, piece, gat, .44
"Niggas knows the deal we clap hammers and shit"

-Mobb Deep Burn Something
by deLf August 02, 2003
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When one wakes up semi-naked/ naked, smeared in makeup which is most likely is not theirs, wondering what the fuck happened the night before, feeling like death, wondering who one kissed/had sex with, where the hell one is, and why one has bruises in such unusual places.
I drank so much last night. I was absolutely hammered.
by K_J_G March 20, 2011
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ham·mer n.

A particularity difficult and gnarly trick performed on a skateboard, the emphasis being on the sickness, as opposed to grace or flair of its execution. Usually down or over a large obstacle, more often than not, sets of stairs and handrails, often switch and at great risk to the skateboardist.

Origins: Popularised and derived from "Hammertime" (MC Hammer), to Hammer (verb), and then to noun, e.g. a Hammer is the product of said ‘Hammertime’ (to ‘go off’, ‘come up’, ‘kill it’ or ‘bust out’).

This meaning of Hammer is promoted most vigorously by Jim Greco. Although once a staple of the 'Hesh' community, Hammers now transcend all hesh/fresh barriers, as the documentation of such Hammers is closely linked with making mo' money though incentives and sponsorship, and translates seamlessly into the philosophy of mainstream rap.
"I got a mad hammer filmed for my part, i'm so ill I make me sick"

"yeah he can throw mad hammers, whatever, his steez mings; pushes like a buggered penguin having an epileptic fit"
by bmr May 11, 2004
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