A coworker of mine announced once that he was "happy as a pig in tall cotton" once. Of course, he's pretty much the Malapropism King of SW Ohio, and he loves to do cliche mashups. "In tall cotton" basically = "really favorable circumstance", and he was combining that with "happier than a pig in [word that would be much more apporpriate at sakeriver]".
Another of his more memorable utterances was "that's the greatest thing since Jesus invented bread!"