nerts adjective 1exclamation 1noun 1forms 2 adjective1 •(slang, euphemistic) Crazy; nuts."You'd be plumb nerts" says he, "to think of it." — 1928 exclamation1 •(slang, euphemistic) Nuts! Expression of dismay.FOUND HIM 'TERRIBLY NICE' She Wonders What He Thought When She Said, 'Oh, Nerts!' After a Bad Shot. — 1933 noun1 •A fast-paced card game played with multiple decks. formsmore nerts · most nerts