cossie
/ˈkɒzi
/ /ˈkɒsi/(also cozzie)
noun (plural cossies) informal
A swimming costume or a pair of swimming trunks.Now of course when it comes to pulling on our togs, cozzies, bathers or trunks and swimming competitively, Australians never seem to be too far from the medals....
- I could see beachgoers in their swimming cossies.
- On Tuesday, she shopped for a swimming cossie at the store.
Origin
Early 20th century: alteration of the first element of costume.