thumbs%20down

To get (a passing vehicle) to stop and give one a ride, signalling to the driver by holding out one's thumb (as a hitchhiker)

“I was stranded in the middle of nowhere, but luckily I managed to thumb down a passing car.”

To disapprove or reject

A gesture signifying disapproval; a thumb pointing down out of a fist.

“He shook his head and gave a thumbs down.”

A rejection or refusal.

“We requested permission but got a thumbs-down.”