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adj. Long, wiry and muscular build prone to squirming and writhing, similar to the build of the order mustelidae, consisting of weasels, ferrets and badgers.
This mustelidous baby is gonna squirm right outta my hands!

- Is your baby fat?

- No, he's pretty mustelidous, long and strong.
by Phat Ballz April 19, 2017
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