budgie smugglers noun[plural only]1 •(UK, informal) A style of tightfitting men's swimming costume cut like underwear briefs that covers the buttocks and groin but not the legs and reveals the bulge of the genitals; especially worn in surf lifesaving and in swimming races.Roughly, the rule goes: if you have just swum, are planning to swim soon or are reasonably proximate to a place where others are swimming, then your budgie smugglers are perfectly acceptable. — 2006
