CRUMMY is a playable word

crummy Scrabble® Dictionary

adjective
crummier, crummiest
of little or no value
(adverb) crummily
16 Playable Words can be made from "CRUMMY"
   2-Letter Words (4 found)
   3-Letter Words (10 found)
   5-Letter Words (1 found)
   6-Letter Words (1 found)