I used to have a collection of 'Pluteisms'...so named for a good 'ol guy named Virgil Plute, who was an electrician at the college where I worked in the maintainance dept...Virgil had a way of taking the most common expression and sort of 'compressing' it and turning it inside out until it is totally 'wrong', but you still know exactly what he means...

"Virgil, you want to go to the shop for that stuff, or shall I go?"....."Oh, I don't care it's six dozen of the other"....what he did was not quite mixed metaphor, but more like "Eschered metaphor", if that makes sense...