A thavage is someone (regularly a fatass who sits at home behind their computer ) who often makes incredulously savage comment online as a result of being bullied for their large gap between their two front teeth
"Oh man, that asshole jared commented on my post again"
"Yea hes a thavage, he cant help it"
The portion of the female body where the thigh meets the ass. The roundness of the ass creates a crease, similar to cleavage. The rounder the ass, the more pronounced the theavage.
"I was stretching with Alyssa before our soccer game. When she leaned back, I could see right up her athletic shorts to her theavage."
"I was waiting on the stair stepper at the gym and some girl's shorts were so short that I could see her theavage."