(transitive) To hinder the development of something. / (intransitive) To revert to an earlier stage of development. / To retort. / Used other than figuratively or idiomatically: see throw, back.

(transitive) To discard (trash, garbage, or the like), to toss out, to put in the trash, to dispose of. / (transitive, figuratively) To waste, to squander.

(transitive) To cause something one is holding to drop, often forcefully. / (transitive, dated) To destroy or demolish.

(slang, idiomatic, transitive) to produce or perform (something) admirably or forcefully.

(idiomatic, colloquial, UK) To throw a tantrum.

(slang, UK, Australia, New Zealand) To take a day off from work for ill health (either real or feigned).

(baseball) The rotation of the knee and lower body of the side of the batter away from the pitcher during a swing.

To fling dust or similar. / (figuratively) To make derogatory or malicious allegations, particularly about people in public life.

(Ireland, idiomatic, slang) To act tough or put up a front. For example, to threaten a person by making "karate chops" at them, without actually doing harm or knowing karate.

(role-playing games) In certain games, primarily role-playing games, an effort to ward off a specific threat by rolling a die or dice and coming up with a particular number.