Vowel foul Share definition Flag The state of words containing excessive amounts of vowels. Common in British spellings i.e. Colour Floccinaucinihilipilification commits a serious Vowel Foul. Vowel foul by Steven P. McBean March 30, 2009 0 0 Get merch Get the Vowel foul mug. Buy Now — $32.95 See more merch