Etymology From the idea of a heavy person making thunderous noise while walking.
1
Derogatory, Often Fat thighs or thighs of great cellulite or stretch marks.
How much art and science would it take to sculpt her formless putty into a classically chiseled profile, to raise her pendulous breasts, thin her thunder thighs, flatten her wattled stomach, remake her into the image that men called beautiful?2014, Olivia Goldsmith, Flavor of the Month, Diversion Publishing Corp., →ISBN:
The bulging biceps were exposed and his thunder thighs showed through his fitted black slacks; it made me want to touch him all over to see if he was real.2015, Mary B. Morrison, If I Can't Have You, Kensington Books, →ISBN:
thunder thighs
noun
Etymology From the idea of a heavy person making thunderous noise while walking.
1
Derogatory, Often A person, usually a woman, with fat thighs.
I just got schooled by a fifth grader, I think in amazement as the four-foot-nothing fireball jogs down the court, arms akimbo, stomach heaving up and down. “Ha-ha, there goes thunder thighs!”2011, Camille Noe Pagan, The Art of Forgetting: A Novel, Penguin, →ISBN:
Whoa Scott, you really shouldn't be eating Janet's donuts! Haha, don't worry, miss "thunder thighs" could do without the extra--2015 January 6, Chris Hallbeck, “Donuts”, in Maximumble (comic):