Noun
UXB (plural UXBs)
(military) Initialism of unexploded bomb.
He captioned the clip: "Today's cordon in Soho due to UXB part two" – with UXB meaning "unexploded bomb". Source: Internet
Watching Scott Morrison’s COVID-19 brochure-brandishing performances in declaring Australia’s pre-pandemic situations reminded me of a World War II British Army instruction manual about how to react in UXB (unexplored bomb) incidents. Source: Internet