Characteristic of a curmudgeon; churlish(adjective)
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Use "curmudgeonly" in a sentence
"It speaks, a little, to me as an affirmation the we (or maybe just I) are more optimistic than pessimistic, which is a bit of a stretch for someone that has been described as curmudgeonly since the age of about 18 or so."
"Veteran TV and stage actor Eric Peterson - best known as the curmudgeonly Oscar Leroy on"
"We don't seem to be all that filled with holiday spirit around here, but I'm kind of curmudgeonly about that anyway except around my family, so I kind of don't mind ..."