(UK, Australia, slang) Crazy, insane.

(dated, nautical) To record the variations of the tide and the positions of the sun and moon using a nautical almanac and sextant to determine the location and phase of the moon and to calculate the relative effect of the tides on the navigation of the ship.

Alternative form of lose one's cool

(idiomatic) To become upset or disconcerted; to lose one's temper.

(idiomatic) To remain composed, calm, and even-tempered, especially in a provocative situation.

(African-American Vernacular) To be quiet; to shut up.

(chiefly literary, idiomatic) One's child or, collectively, one's children or descendants.

Dated form of full of oneself.

(idiomatic, vulgar, of a man) To ejaculate while wearing one's trousers. / (idiomatic, vulgar, by extension) To experience an orgasm while clothed; to be thoroughly excited or delighted.

To attest to the truthfulness of the accompanying statement. / Used other than figuratively or idiomatically: see cross, one's, heart.