1). A playful phrase spoken to friends as a term of endearment. The phrase "your a thumb" roughly means "your dumb" and is spoken to friends to emphasize their flaws, in a loving way.

2). The phrase "your a thumb" may also mean "you have a big forehead"
1) Katie: *falls*

Malia: "YOUR A THUMB"

2) Malia: "Brendon has such a big forehead"

Katie: "He's such a thumb"
by SodiumChloride11111 May 18, 2018
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1) to pray or implore; 2) to safeguard against failure; 3) to think of something; 4) to try to express an idea; 5) to look exasperated; 6) to appear hungry; 7) to eat a meal; 8) to satisfy a requirement; 9) to have the right stuff; 10) to check oneself
James: i'm never gonna finish this paper on time
Gabe: dude, you better salt your thumbs
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When you talk shit about someone through Twitter or similar sites.
"I'm tired of you talking shit Karen. You're always running your thumbs about me!"
by StGanjus May 24, 2018
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A term meaning commonly used to mean overweight and lazy, as the act of sitting on one’s thumb implies that they aren’t doing any work and are “flatteningthe finger with their weight.
John: “You have been doing nothing except sitting on your thumbs all day, that’s why none of the other employees like you and you’re clinically obese.”
by wordsmith113 July 20, 2021
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A text message most commonly sent to some one who has suddenly stopped replying in a text message conversation.
Tom: So anyway, would you mind if I borrowed your biology lab notes?
Emmi: (No response)
Tom: What's the matter? Cat got your thumbs?
by Tucker Maile September 2, 2008
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"Put your thumb down" is a phrase that is used when someone try's to throw up the horns (a gesture where you pull in you middle, ring and thumb into your palm. Often used by fans of the metal genre. )but leave the thumb extended.

Often said to newer metalheads or posers. (Keep in mind if you make the mistake as a new metalhead it does not make you a poser.)
Metalhead: "DruidLord is brutal"
New Metalhead: "Fuck yeah it is" *throws horns with thumb*
Metalhead: "Put your thumb down!"
New Metalhead: "shit sorry"
by Flameb0i March 28, 2022
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When someone doesn't text you back after you text them, you text them "cat got your thumbs?". It's a play on "cat got your tongue?", which is an idiom used to compel someone to speak who is unusually quiet.
Sam texts: "Hey what's up, I'm in your hood"
No response....
Sam texts: "Cat got your thumbs?"
by dantechulo September 16, 2008
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