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4.
A penis with a lenght of roughly two inches.
That fucker with the twinch couldn't make a chocolate eclair cum.
by Robbie-O December 23, 2007
 
1.
When you're so drunk you can't see two freackin' inches in front of your face.
Bernard drank way too much last night, he couldn't see twinches.

No more shots for me I can't call a cab with twinches.

Do not let me drink to the twinches, I have to work in the morning.
by Enid Eats Squid February 03, 2010
 
2.
the combination of tweet and flinch.,.,..the moment you hesitate before sending a Tweet you will regret.
Before outing her HS quarterback, she twinched at that awkward moment under the bleachers.
by BobtheMediaGuy October 22, 2013
 
3.
A man with a two-inch (or smaller) penis.
Annie: "Oh my gosh, Aaron is so cute!"

Damian: "Girl, don't even, he's a twinch."
by reeny95 October 16, 2011