1. a tool used many purposes, including smashing things.

2. a big hit for rocker Peter Gabriel. It hit Number One in America during the summer of 1986. It has an award-winning, revolutionary video that features Claymation, or some technique similar to it. Peter Gabriel sings the lyrics from the point-of-view of a cocky guy, maybe as a parody of all those cock rock hits.

3. anything that breaks the ice, or shatters the walls of shyness or alienation in a person. Then you can get a certain person better and establish communication with him/her.
1. Richard got so pissed at the shallow boobs that were giving out what passes for the news these days he picked up a sledgehammer and smashed the fucking TV into junk.

2. A big highlight of the Peter Gabriel concert that I went to in 2003 was his megasmash "Sledgehammer".

3. ... I wanna be ... your sledgehammer
Why don't you call my name?
Ha! I wanna be your sledgehammer...
by I Saw U2 Live Twice September 21, 2007
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The model of bicycle Pedro Sanchez rides in the movie "Napoleon Dynamite." It has a shock, pegs, and a mexican flag flying from the seatpost. Lucky! He regularly takes it off sweet jumps and gets like three feet of air.
Pedro: Eets a sledgehammer.
by Uncle Rico February 28, 2005
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what your pulse/heartbeat feel like when you lose your virginity
If you could take my pulse right now, it would feel just like a sledgehammer.
by analpriest November 26, 2014
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The act of a man inserting his penis and having "intercourse" using the space between his partner's genitals and anus.
Julio: Dude, did you really give that chick a sledgehammer?

Mike: Why yes, yes I did.
by abysmalhorrors March 29, 2005
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A young man who attends Kingswood School in Corby, England. He's around 14 years old as of 2004 and wears a tight leather jacket with ankle swinger trousers. He looks like a cross between Michael Jackson and Lemmy. His name originates from a friend who looked at him and thought (For some random reason) of the Peter Gabriel song 'Sledgehammer'.
::Insane laughter:: Look! It's sledgehammer! Let's sing the song: "Sledgehammer!"
by Ronald Edgar February 5, 2004
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Jim Ross: Bah Gawd, Triple H nearly took his HEAD off with that damn Sledgehammer... what a slobber knocker!
by sadfsfgsdfgefg November 10, 2007
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