A weight which is dropped into a bore, as of an oil well, to explode a cartridge previously lowered.

present participle of go postal

(intransitive) To enter into an armed conflict. / (intransitive) (of a person) To depart, typically from one's home, to join an army at war.

hortative of go. / Let us begin or get started. (a call to put a plan into action) / (colloquial) Hurry up; be quick. / (colloquial) Bring it on. (an incitement to fight)

present participle of go Dutch

(intransitive) To explode. / (intransitive) To fire, especially accidentally. / (intransitive) To explode metaphorically; to become very angry. / (intransitive) To begin clanging or making noise.

Is it going to rain?

(slang) To turn out wrong; to cease to function or exist.

(intransitive, especially of an animal, chiefly UK) To escape into a burrow, hole, etc. when being hunted.

(boxing) To participate in a boxing match for its maximum number of rounds. / (idiomatic, by extension) To have the endurance to see a difficult, sustained challenge to its natural end without faltering.