Verb
get over oneself (third-person singular simple present gets over oneself, present participle getting over oneself, simple past got over oneself, past participle (UK) got over oneself or (US) gotten over oneself)
(informal, chiefly imperative) To cease to be vain and self-obsessed.
When he told me I was to serve him as if he were a Russian czar, I told him to get over himself.