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
D_mastersによって 2012年06月10日(日)
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,
Tiffffanyによって 2011年07月21日(木)
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
Chelliによって 2004年09月11日(土)
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
biggesthottayevahhによって 2013年11月26日(火)
Basically, you have normal thighs, then they get fat (tier 1). But when they get like even fatter, you get another level of fat like a hill of fat(tier 2), which is loose off the other fat so when a thunder thigh is being walked besides the legs (tier 1) rubbing against eachother they (tier 2) hit eachother making a noise, hence thunder coming into the expression, most likely to because of alliteration for a dramatic, comedic affect. This sound can have a brighter tone and richer feel if accentuated with bumpy cellulite
Damn, those thunder thigs are so massive it looks like shes got a second arse

It's like someones stuck balloons in those thunder tighs

No, no....come on, this cant be real, that girls got thunder thighs ripping out like the hulk
F-Laboyrieによって 2007年05月31日(木)
When a person's thighs are so large, they clap like thunder.
Did you see that girl's hips? Damn she's got some thunder thighs.
hKbAによって 2010年10月17日(日)
When a girl has enormous thighs that make you waddle when you walk.They rub up against each other and make a slapping noise when walking
Damn that girl Krystin got some thunder thighs on her.
Melissa Sanderzzzによって 2007年06月05日(火)

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