From Longman Dictionary of Contemporary Englishbathing trunksbathing trunks /ˈbeɪðɪŋ trʌŋks/ noun [plural] DSSDCC British English old-fashioned a piece of clothing worn by men for swimming SYN swimming trunks
Examples from the Corpus
bathing trunks• Neither barber, in their tight-fitting tee shirts and faded bathing trunks, appeared lacking in backbone or mettle.• He was wearing a pair of olive-green bathing trunks, and nothing else. 