snotty adjective 3noun 2forms 3 adjective3 •(informal) Running or dirtied with mucus. •(informal, disapproving) Ill-tempered or impertinent in an arrogant, conceited manner. •(informal) Resembling or characteristic of mucus, especially in texture.Greasy hamburgers or snotty eggs? How about some of those fine pancakes that needed a steak knife to hack through? — 2007 noun2 •(slang) A midshipman. •(Australia, slang) The lion's mane jellyfish, which secretes a mucus that can foul fishing nets. formssnotties · snottier · snottiest