Why you get called a twatermelon:
1. Not following bros before hos.
2. Leaving a party early.
3. Not making a move on a girl.
4. Acting like you are drinking at party when you are really just trying not to look like a twat.
"I cant, I told Sara I would hang out with her tonight."
"John, don't be a twatermelon. Get your ass over here."
"O.K. I wont puss out."
''She thought she was a freak, but i turned her vagina into a twatermelon.''
The pornstars vagina was left a twatermelon after Ryan was done with it.