3 definitions by Thanks for the help Melp.

Top Definition
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.
I voted thumbs in last election.
by Thanks for the help Melp. March 12, 2015

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This is how a person with very little intelligence can be referred to as.
That guy is a "dollar short for the bus ride home".
by Thanks for the help Melp. May 14, 2008

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Someone that would NOT be included in any cliques.
Don't be a Kacy, just come to lunch with us.
by Thanks for the help Melp. July 14, 2008

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