An extremely overweight individual who cannot walk without their thighs making a thundering clap.
This term has been used mistakenly to myself.

I had a horrible bicycle accident when I was young and my right thigh was ripped open, even though they stitched it with 16 stitches, I still feel pain more than 10 years later.

This part they stitched isn't flat like the rest of my thigh so it tends to rub against my other thigh and because this accident made it hard for me to be active, yes I am a big guy - not a fat guy, my legs are more muscle than fat, I can bike my 280 body up a vertical hill on a 1 speed freestyler (sometimes I can't do it though..my right leg goes completly numb) well thats why I am not offended, because I am not the one your joke is even ment to be aimed at.

"John had a terrible accident, and now years later some few jealous - ex girlfriend co-workers are calling him 'thunder thighs', which is mistakenly used and is way out of context.. John thinks they should go F$!$#@ themselves!"
by John.Haynes February 24, 2008
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A woman's thighs that are so powerful that when clapped together, kills everyone in an 100 mile radius
Oh my god her thunder thighs killed my son *insert clap noise*
by rrelish November 7, 2018
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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.
by bobbyddd November 24, 2014
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when someone has extreeemely large thighs (guy or girl) may be a very muscly guy and may involve OVERHANG. these thighs are so powerful that when running is done by the individual, the ground may rmble like thunder hence 'thunder' and some times sparks may be produced like lightining.
A - "wooow what the hell is that???"
B - "EARTHQUAKE!!!!!!!"
A - "oh wait no its only Jimmy and Singo, jesus look at those thunder thighs!!!!!"
by zachary1604 February 23, 2009
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A man with thighs so powerful that they emit the same force as mother nature herself
I wouldn't want to be between John thunder-Thighs and anything he wants
by thot#_killer October 22, 2018
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Yesterday I went to visit my grandpa at the retirement home and there were Thunder Thigh Dinosaurs everywhere.
by Cryscuffs February 25, 2011
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