1 definition by Thatguywhocamehard
When you cum so hard your abdominal muscles contract involuntary causing you to hunch forward making your back curvy like a turtle shell
Person 1: Dude i came so hard last night! I turtle shelled for atleast 20 seconds.
Person 2: Nice bro. *high fives*
Person 2: Nice bro. *high fives*
by Thatguywhocamehard September 28, 2017