The acceleration of typing speed but deceleration of the accuracy in the words , content and context while texting due to thumbs fatigue although thought flows are exponentially high. Also known as FBST syndrome.
I was texting this girl come over to my room but instead I got hit with Fast Brain Slow Thumb syndrome and wrote “Come Over my hoes” so I blew my chances.
by Sassy Sheesh November 24, 2021
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Thumb strum

When your index and middle finger get tired while fingering so you use your thumb instead.
Last night I had to give her the good ol'thumb strum
by Kung flue July 19, 2020
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just put a thumb in it

when your 50. cal explodes on cam, your jugular gets punctured and your lung collapses, and you shove your thumb and shirt into the wound to stop the bleeding and losing other fluids
Guy 1:Did you hear Scott made another 50. Cal explode?
Guy 2: No, did he Just Put A Thumb In It?
Guy 1: Nah, it was for an experiment to see why his 50. cal blew up
by CeraNeon January 19, 2024
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Black Thumb

One that constantly kills indoor plants. The opposite of having a green thumb.
Ann killed all her house plants. She has a black thumb.
by Bk102886 November 14, 2020
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Black Thumb

A Black Thumb is the male equivalent of a black widow. It's a toxic, narcissistic man who is poisonous to everyone he encounters, much like Henry the VIII. His heart is black as the underworld, and he's as attractive as a thumb, hence black thumb.
Her: Are you still dating Killian?

Me: That guy is a black thumb, I'm embarrassed I ever dated him.
by Siouxsie Supertramp September 26, 2023
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Thumbing my nuts

An expression of awkwardness. When you find yourself suddenly alone, bored and with nothing to do. Can also be used to convey a feeling of abandonment.
“Where the hell have you guys been? I’ve been sitting here all night thumbing my nuts waiting for you!”
Well I’m not gonna just sit here thumbing my nuts!”
by Joezer4911 June 17, 2022
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Thumb treatment

When you put your thumb up a girls butt while doing it from behind, almost as if its a butt plug.
"Yo, did you and katie do it last night?"

"Yeah, she took the thumb treatment."
by AskPhantoms June 04, 2024
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