Jacquie Manning, now half of the duo Small Potatoes, used to sing a solo act as The Queen of Tarts, and she'd sing:

Oh, if you need a Druid to lighten your mu-id
and not to get cru-id or pose in the nu-id,
We'll eat all your foo-id and drink all your flu-id
and then we'll get stew-id and fall on the floor.

My wife and I do the air as an instrumental but occasionally stop playing, sing the above, and start up again, just to watch audiences say, "Wha?"