I'll start the gorge rising with: copiously cough up the cakehole, decorate the pavement, laugh at the carpet, liquidate your assets, reverse lunch, Technicolor yawn,
liquid laugh, personal protein spill, serenade the drain, and make pavement stew.
As you can see from the illustration, the bald, fat maniac sticking his finger down his throat is performing the universal symbol of the
liquid laugh, and unintentionally sends a subliminal message to drivers to keep going until they reach a Little Chef instead.