Answer: mucked

AnswerCrossword Clue
MUCKEDFolded (one's hand), in poker slang
MUCKEDTossed in, as a losing poker hand
muckedMishandle (a job or situation); spoil (something)
muckedRemove (manure and other dirt) from a horse's stable or other animal's dwelling
muckedSpread manure on (land)
muckedMUCK, to manure with dung