List of British Words Not Widely Used in The United States - Y

Y

Y-fronts

men's briefs with an inverted-Y-shaped frontal flap; originally a trademark (US: jockey shorts/briefs; US slang: tighty whities)

yob, yobbo

lout, young troublemaker (origin: boy spelt backwards)

yomp

to move on foot across rough terrain carrying heavy amounts of equipment and supplies without mechanised support (Royal Marines slang popularised by the Falklands war, army equivalent is to tab). Also used informally for any walk across rough ground.

yonks

a long time, ages. "I've not seen her for yonks." (colloquial)