Added 10 October 2026 foul-up /ˈfaʊl ʌp/ noun Categories: ActionsObscure Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about foul-up at Wordnik → Where our words come from → A disastrous mistake. Related Words: flubmisdoingblooperblunderboo-boobotchbunglebonerstuff-upfluff-upfiascobotch-up Back to today's word