mishap /ˈmɪshæp/noun 2/mɪsˈhæp/ verb 1forms 3 noun2 •An accident, mistake, or problem.Since the mishap with the banana peel, he watches his step. •Ill luck; misfortune; mischance.Rome’s readiest champions, repose you here in rest, Secure from worldly chances and mishaps! — 1588 mishap /mɪsˈhæp/ verb1 •(no longer used) To happen through misfortune; to mishappen. formsmishapped · mishapping · mishaps