plural of one-acter

(transgender slang, derogatory) Transphobic humour satirising non-binary gender identities through mockingly identifying as fanciful objects; seen as trite and uninspired.

simple past tense and past participle of one up

present participle of one up

not in the slightest; not in the least

(idiomatic) To misspeak, to say something embarrassing or wrong, or to make a mistake in public, or a social blunder, that is embarrassing or offensive.

The state of having invested heavily in just one area. / The state of having devoted all of one’s resources to one thing.

(idiomatic) To remain calm, composed, focused, or aware.

Alternative form of wear one's heart on one's sleeve

Alternative form of keep one's head