Third-person singular simple present indicative form of stand on one's head

(figuratively) To ostentatiously display remorse, sorrow, or upset.

(historical) To express defiance by putting one's thumbnail into one's mouth and knocking it against the teeth.

To promise.

To position one's shoulders back and in a straight line, forming a sort of square's edge. / (figuratively) To prepare to deal with a hard task, to ready oneself for difficulty.

Alternative form of step up one's game

(colloquial) One or more servings too many of alcohol, leading to drunkenness; one too many.

(Australia, slang) Alone, on one's own

(slang, vulgar) Synonym of cream in one's jeans

plural of one-armed bandit