The leg/ thigh region which also includes the buttocks of a female. Usually large with dimplings of cellulite that can be seen from afar. Often it wiggles on its own free will, and has a tendancy to get hot from friction burns.
Damn that chick has got her Thunder Chunkies on...
Bitch...if you keep eating you will be Thunder Chunkies!
Those spandex really show off your Thunder Chunkies...
When you get a girl ridiculously drunk, and whilst she is chundering in a toilet you slip your willy in her vagina. You proceed to ride her of the convulsive movements of her body as she vomms. This can lead to a "thorgasm", the next stage in thunderchucking.
Both thorgasm and thunderchucking can be confused with norse mythology, but avast do not be baffled. Thunderchucking is a pun (play on words) of chunderfuck, thus humour ensues a-plenty. Suffice to say a night is only ever complete with the acheivement of one thunderchuck minimum, although jocularity is not always dependant on a thorgasm.