hah exclamation esp. humorous - used to express satisfaction that something bad has happened to someone who deserves it, or to express a feeling of victoryHe's left her has he? Ha! That'll teach her to go chasing other women's husbands!Ha! So I am right after all!
HA
Meaning of HA in English
Cambridge English vocab. Кембриджский английский словарь. 2012