(slang) Less vulgar synonym of work someone's ass off.

(Canada, US, vulgar, slang) Synonym of work someone's ass off.

(set phrase) Aggressive remarks that foreseeably may lead to a potentially violent confrontation; in law, often considered mitigation for otherwise sanctionable behavior (fighting).

(Britain, humorous) Intentional misrendering of the proverb "the world is one's oyster".

plural of word problem

A mathematics question that states verbally what is usually expressed with symbols or diagrams.

(idiomatic, of two or more parties) To argue, to have an argument. / (idiomatic, of one party, followed by with) To speak sternly, angrily, or in an argumentative manner to.

(idiomatic) One's requests or orders must be fulfilled.

Interpersonal communication by digital media, especially using keyboard devices.

(Britain) Practicum (college course).