grinch /ɡɹɪnt͡ʃ/noun 2verb 1forms 3 noun2 •A grouch or killjoy. •(informal) A person who is aggressively intent on ruining the Christmas holidays for others. verb1 •(US) To act like a grinch; to be a killjoy towards someone. formsgrinched · grinching · grinches
