(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

present participle of blow one's load

(informal) To destroy totally by explosion.

(idiomatic) To uncover (a secret or scandal).

(idiomatic) To spend all of one's money. / (idiomatic) To expend all of one's resources or efforts; to express all the arguments or ideas which one has. / (idiomatic, vulgar) To ejaculate, to cum.