Thunder-thighs derogatory slang rude
Thighs covered with soft, loose fat.
Look at you thunder-thighs! You should really work out more and eat less.
He’s got thunder-thighs since he gave up running.
Someone whose thighs are covered with soft, loose fat.
My mom told me that I had been quite the thunder-thighs when I had been a toddler.
Hey, thunder-thighs. Take this chair. I don't think that you can fit in that one.
The origin of this slang is not clear.