New one on me

Cosplaying??? Playing the cos? Splaying in the company of someone else? Not in my dictionary. A typo or something invented to describe Jonah Burnbum’s antics?
    Off to Mr, Internet. Blame the Japanese for this contraction of costume playing. And it’s what Jonah and the Sadgeek of a London mayor were doing in Sainsbury uniforms when they were chucking some bread around in an attempt to be noticed.