1. A gigantic, flabby, asymetrical, disgusting ass. Resembles a thundercloud due to its shapelessness, constant shifting, and that it strikes terror in the hearts of small children. Has been known to nuetralize erections and make beer taste flat.
2. A fart that echoes for at least 3 seconds.
1. I almost threw up when I saw that thunderbutt!
2. That thunderbutt was fucking nasty!
A person (usually a woman) who's ass is so massive that when she walks her ass creates a thunderous rumble that frightens everyone around her.
Daaaaaaamn that womans ass is HUGE. She's got a Thunderbutt
You know those one Mexican chicas in the group that nobody every gets with, kindda like the American DUF or DUFF. (Deignated ugly friend- Designated ugly fat friend)
Paco ate a taco when a grupo of chicanas passed by. He commented on all but the Mexican Thunderbutt. She was sad she ordered 12 bean burritos to-go with her diet coke.
The art of buttfucking a black nigga with viagra.
Nigga u tryna dirty thunderbutt each other?
When you drink the water in Mexico and end up with bloody diarrhea for a week.
Jorge thought his case of Mexican Thunderbutt was the worst by-product of his bachelor party in Tijuana. If not for the Mexican Strikeout, perhaps he would have also remembered the crabs he got from a dirty Mexican hooker.