(idiomatic) One who wisely settles a difficult matter.

(espionage) Of a spy: to return home after having gone undercover in enemy territory. / (by extension) To gain widespread acceptance in a group or society, especially where there was not any before.

(idiomatic) If a possible worst-case scenario actually occurs. / (idiomatic) If an already bad situation progresses into a catastrophic situation.

Alternative form of until the cows come home

(idiomatic, of an event, thing, person) To emerge, come up; be about to happen; to approach or arrive on the scene; to present (itself or oneself).

Asks for permission to enter a room.

(idiomatic) To make significant progress.

(idiomatic) To initiate an encounter or interaction by behaving in an unrestrainedly aggressive, confrontational, or accusatory manner.

(idiomatic) To rescue (or save) someone from further harm.

(Australia, informal, intransitive) To attempt to deceive or impose upon (someone).