mardy /ˈmɑːdi/adjective 2noun 1forms 3 adjective2 •Sulky or whining.He's a mardy child. •Non-cooperative, bad-tempered or terse in communication; grumpy.Well, now then mardy bum / Oh, I'm in trouble again, aren't I? — 2006 noun1 •A sulky, whiny mood; a fit of petulance.Sometimes my mum’s in a mardy and she says she doesn’t care about us — but she does really. — 2001 formsmardies · mardier · mardiest