To share a sleeping arrangement, such as a bed, bedroom or stack of bunk beds.

plural of bunk-up

A trough from which cattle are fed

(intransitive, informal) To sleep in the same house, room or bed as someone else.

(fandom slang) Used to imply that one needs to excuse oneself to privately indulge in a pleasurable activity, particularly masturbation.

(military) A hardened shelter, often partly buried or fully underground, designed to protect the inhabitants from falling bombs or other attacks.

(nautical); (sports); Often followed by down: to take shelter in a bunker or other place. / (nautical) Of a vessel: to take a load of coal or fuel oil for its engine.

(Britain, slang) One who bunks off; a truant from school.

(US, regional) The menhaden, any of several species of fish in the genera Brevoortia and Ethmidium.

(slang, countable) Senseless talk; nonsense; a piece of nonsense. / (politics) Bombastic political posturing or oratorical display designed only for show or public applause.