glumpish adjective1 •(dialect, old-fashioned) grumpy; sullen; gloomyAn' it worrets me as Mr. Tom 'ull sit by himself so glumpish, a-knittin' his brow, an' a-lookin' at the fire of a night. He should be a bit livelier now — a fine young fellow like him. — 1860 formsmore glumpish · most glumpish