beige flag noun3 •(slang, figurative) A clue or indication (especially on an online dating profile) that a person is boring or unoriginal.just seen someone on tiktok saying people talking about pineapple on pizza on dating apps is the biggest "beige flag" and i could not agree more — 2022 •(slang, figurative) A mundane but mildly unusual quirk or habit of one's romantic partner.my bf's beige flag is he'll constantly tell me he has ocd but then proceed to cut the brownies like this 😭😭😭 — 2023 •(slang, figurative) Someone who has a beige flag (in either sense).That guy is a huge beige flag. formsbeige flags