Verb
climb the walls (third-person singular simple present climbs the walls, present participle climbing the walls, simple past and past participle climbed the walls)
(idiomatic) To behave in a distressed or frantic manner; to exhibit great agitation.
Max?” said the Gasman. "Are those, um, rats?” Lovely. "Yes, those do appear to be either rats or mice on steroids,” I said briskly, trying not to shriek and climb the walls like a girly-girl. James Patterson