Rather than the thumbs up or thumbs down response to something, "thumbs in" denotes an inability to care less. While holding one thumb up and the other thumb down, you then bring both thumb gestures behind you and motion to place both thumbs "in" your ass.
by Thanks for the help Melp. March 12, 2015
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small picture online, usually which can be clicked on.
by falln June 19, 2004
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The bump that forms in the zipper of mens' pants that is often mistaken for an erection
Girl: Look at that boner
Guy: It's a thumb goddammit...THUMB I TELL YOU!
by Kommander_K May 15, 2009
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If you don't like the way I drive, you can thumb it.
by Pseudonym August 29, 2004
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(verb) Using a finger to push a small object into your buttocks.
ED: "Hey Randy how can we make this ecstasy really kick in?"
RANDY: "I say we thumb it!"
by Effthis1906 April 1, 2010
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To "like" something on facebook. Telling someone that you like something doesn't necessairly mean that you liked it on the book, but saying "I thumbed that" doesn't need clarification.
Dude, I thumbed that last night

He obviously posted that thinking that everyone would thumb it. They didn't. What a bad athumbtion.

She thumbed everything on my wall. It was a freakin thumbderstorm!
by DowntownDBrizzown November 24, 2010
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The act of getting kicked out of a gentleman's club by inserting thumb in exotic dancer's anus.
Jimmy got us kicked out because he was thumbing Passion!
by Jerry Lar July 15, 2010
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