sex up verb5 •(slang) To make more sexually attractive.Enrique Iglesias sexed up his music video to appeal to a younger audience. •(slang) To enhance in terms of fashionable appeal.How do I sex up my phone? •(slang) To sensationalize.BBC journalist Andrew Gilligan today said David Kelly was in no doubt the government had “sexed up” the Iraq intelligence dossier at the heart of the Hutton inquiry. — 2003 •(slang) To take part in sexual acts with.I wanna sex you up! •(slang) To arouse somebody sexually.Get spanked: it'll sex you up! formssexed up · sexing up · sexes up