A man or women that has massive thighs and legs that look fat, possibly disproportionate to the rest of their body.
Look at those woman's legs, she has thunder thighs
af D_masters 10. juni 2012
"THUNDER THIGHS" are a fat girls thighs that are so humoungous, big & fat that they clap together when they walk. This produces a loud noise which goes like "SLAP, SLAP, SLAP" , hence the "thunder" part of the word.Also causes earthquakes,volcanic eruptions,and tsunamis from just one clap.So make sure you stay away.People have been know to wander near the thighs and never seen or heard of again.EVER
Damn son another girl must have Thunder Thighs cause there is a earthquake happing right now!
af Chinfu 25. december 2014
A name of a girl that uses the fat of her thighs to ejaculate a man. When finished both become thunderstruck
Gina is quite the thunder thighs.
af bobbyddd 24. november 2014
A name of a girl that uses the fat of her thighs to ejaculate a man. When finished both become thunderstruck
Gina is quite the thunder thighs.
af bobbyddd 24. november 2014
enourmously huge thighs, usually matched with huge slabs of fat falling over them.
Dude that chick has major thunder thighs....i could climb into one and live
af Chelli 11. september 2004
a girl with perfect hips and thighs and knows how to rock a bikini. Usually has the best body out and goes perfect with abs. Thigh gaps arent even needed if you have thunder thighs, your basically perfect already! be careful not to judge people by this, and dont use it against them.

thunder thighs are the opposite to fat so dont make it out to be
person 1: dayumm girl you got some thunder thighs!

person 2: biggest hottie out
af biggesthottayevahh 26. november 2013
muscular thighs that anyone would want. Thighs of steel. Usually thighs of a soccer player.
Laura: How's soccer going?
Jamie: It's awesome, check out my thighs!
Laura: OMG, you have thunder thighs - hard as a rock,
af Tiffffany 21. juli 2011

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