A pathetic person that sees conspiracy behind every post in Craigslist's Rants and Raves. A Thumper believes all posts that offend him are the work of one person. He also thinks that all flagging is done by that same person. A Thumper posts repeatably, with a complete lack of creativity, desperately trying to rally the troops to the validity of his twisted view of reality. He fancies himself as a leader, but alas has no followers.
The Thumper in WDC Rants and Raves is crusading against OBAMANAZI, a mythical person that exists only in his mind.
by Phuc Yoo May 04, 2010
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Thumper is a drinking game. How to play - everyone playing the game must drum their hands on the table/thighs/whatever you got and the first person to start yells out the phrase, "What's the name of the game?" and then everyone else yells back, "Thumper!" then the first person yells out, "And why do we play?" which is returned with, "To get fucked up!" then when all the drumming has commenced the first player does two dance moves then looks to a random player and then they copy the first players second move and then add a move of their own and then look to a different player and they copy the second players move and so on and so forth. If a person messes up a move then, that's when the drinking comes in. He/She has to chug a cup of beer.
"Holy crap, what happened to you last night?"

"Someone suggested Thumper. I was already too fucked up to argue."
by ☼ winnie ☼ October 29, 2013
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From the bay area circa 1999. Made from the sound of a gun, later goes on to be slang term for a gun.
Keep my finger on my thumper, twist wigs back, head crack. ~E40
by Wolf February 16, 2005
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A very large ass. Comparing it to the ass of a rabbit off the movie Bambi.... Thumper.
Damn look at that bitch rite there, that bitch got a thumper.
by Snoeflyke February 19, 2010
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A custom motorcycle sporting a large single cylinder engine.
I just bobbed my Suzuki S40, Now it's a cool little thumper!
by hhhmmaann June 19, 2010
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