Mispronunciation of the word Fillet used in culinary activities. Often the mispronouncer likes to think they are posh, and drops in sounds that just aren't there or thinks they speak French.
Waiter: 'What would you like to eat, ma'am?'
Ma'am: 'Oh, I, um, don't know. I can never decide between the feelay of fish or the chicken feelay burger!'
Waiter: 'Feelay... What?'