(slang, derogatory, UK) A member of a non-elite regiment, not in the British army's parachute regiment or the SAS.

simple past tense and past participle of underboil

A surgical procedure in which the hip joint is replaced by a prosthetic implant.

(countable) A cage to keep pet or zoological specimen birds in. / (uncountable) A game of chance played with dice; chuck-a-luck.