A psuedo-British slang created for those not fluent in said type of slang. Moppy bits can apply to anything you want to make 'sound British.'
"You're getting your moppy bits confused with your tingly tallies, o'aight?" ; "Are you telling moppy bits?" ; "That is a fine piece of moppy bit!" ; "You've made some real moppy bits of this situation."