Top Definition
noun: Big fatty arms on a relatively skinny girl. See Hilary Duff.
"Man, Hillary Duff would be hot, save for those thunder arms," - Weirdo

"Fuck no, she's nasty." - Normal person
#pop #anatomy #rushmore #gaynal #batman #carlos #mickey
by Geoff L. January 03, 2006
8 Words related to thunder arms
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