weaselly

adjective2

1. •
   Resembling a weasel (in appearance).

   • “Pretty?” […] Mr. Prestcott considered. “Fair to middling. Bit weaselly, if you know what I mean. Wouldn’t have been much without makeup. As it was, she managed to look quite attractive.” — 1942
2. •
   Devious; cunning; misleading; sneaky.

   • With intellect weaselly, artist has easily earned all his bacon and greens by it, And now that it’s done and all ready for Fun, it’s my duty to say what he means by it. — 1864