Someone who is easy to set off or have very low amounts of patience. You could say something meant as a compliment and they'll flip out regardless.
Guy 1: Dude, ready the fuck up!
Guy 2: It's only been 5 seconds you testy fag.
by DominicCross January 31, 2019
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A slang nickname for an individual who has more than 2 testicles
*shouting at balled individual* "Hey Testy, what you up to tonight?"
by Christopher Ord December 04, 2006
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A test-taker, or one who prefers tests to projects

The term was popularized by Mrs. Katherine Buron of Leicester, Massachusetts
Mrs Buron: Ok, So we have our testys over here...

Mrs Buron: Shhh, Don't Disturb the Testys!!
by Any Other Names? May 18, 2009
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Jumps more than a pornstar on a cock
When people see him he will do a testy and keep jumping
by EnerJyezed September 22, 2019
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