A penis - particularly a penis that is curious and/or searching for something. The gorilla thumb might be particularly hairy or thick, although not necessarily. Ideally, it doesn't have a fingernail.
by bullfrogboy January 20, 2009

A synonym for thumbs up. I.e., simultaneously making a fist and extending a thumb to signify approval.
by cherryblossom October 2, 2007

When your thumbs hurt because of playing super mario brothers for extended periods of time on the Nintendo Wii
by Mario Thumbs January 14, 2012

Due to an irritation caused by the use of the thumbs up emoticon (y) as used in msn messenger, rachenne has resolved to the use of *thumbs up* to facilitate the same meaning, through the use of a few more characters.
by <-=ryan=-> March 15, 2005

Thumb-fucking is a term describing repetitive text-messaging.
Will you stop thumb-fucking your girlfriend and listen to me for one second?
Who are you thumb-fucking?
Who are you thumb-fucking?
by Bear Toe March 13, 2008

a) a hand signal, interpreted to be negative, which consists of a fist, sideways, with the thumb pointing to the ground.
b) below Satisfactory or unacceptable.
c) An indication to kill
antonym: thumbs up
b) below Satisfactory or unacceptable.
c) An indication to kill
antonym: thumbs up
My fellow motorist gave my driving the thumbs down, before speeding off with his arm and middle finger extended.
I'm sorry, but this definition is crude, immature and a failed attempt at humour. I've just have to give it a thumbs down
The roman gladiatorial type looked about the colloseum to see row after row of thumbs down, so he cast his net over the opponent and speared him through.
I'm sorry, but this definition is crude, immature and a failed attempt at humour. I've just have to give it a thumbs down
The roman gladiatorial type looked about the colloseum to see row after row of thumbs down, so he cast his net over the opponent and speared him through.
by Kung-Fu Jesus June 8, 2004

by Your mom23423 April 11, 2010
