Mine, growing up, was "Beelzebub had the devil for a sideboard"
Some of the best ones I've heard:
Tonight, I sellotape my glove to you (celebrate my love)
Dance, Dance, wherever you may be, I am the Lord of the Dance Settee (Lord of the Dance, said he) - almost as good imagery as those poor bears
And of course, the first line of the Australian National anthem goes "Australia's sunset ostriches" (Australia's sons let us rejoice).
I now can't sing the correct words...