(transitive, idiomatic) To overreact to or overstate; to treat too seriously or be overly concerned with.

(idiomatic, informal) To exit or remove oneself from a less than exciting location or environment.

(slang, figuratively) To become explosively angry; to lose one's temper.

Expressing exasperation or impatience with a situation.

(idiomatic) To astonish someone, to flabbergast someone.

present participle of blow off steam

To expel mucus or other matter from one's nasal passages, via one's nostril, by force of lung power.

Alternative form of lose one's cool

(idiomatic, vulgar or slang) Of a man: to ejaculate; to cum. / (idiomatic, vulgar or slang, figuratively) To expend one's resources or one's opportunity, especially prematurely; to blow one's chance.

Synonym of blow one's top