Submitted by György Chityil ... on Fri, 01/19/2018 - 18:41 Hierarchy: NounDescription: {{plurale tantum}} {{British|informal}} Men's briefs that have a fly as part of an inverted Y formed by the seams.Ngram: Y-frontsNgram Text: Y-frontsSource: WiktionaryIssue: 0Wiktionary tag: plurale tantumNgram Count: 1