A phrase used in place of any actual words in a conversation between two teenage girls with multi-colored hair. Variants of this phrase such as "Batman crunch schmeh" "Crunch Man Bat Schmeh" or "man crunch schmeh bat derp" are also commonly used for variety.
I heard these two retarded girls talking the other day, they were like screaming "BATMAN SCHMEH" at each other and then at the cars on the road.