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Box-standard, ffs
[citation needed]
The other most often repeated theory of the derivation is that it is a mispronunciation of 'box standard', the term referring to unmodified goods coming straight from the box. This appears to be a later expression, first recorded in 1983, but is likely to have been around in everyday speech for some years prior to that. If one phrase did influence the other, it is more likely that 'box-standard' is a mispronounced or euphemistic version of 'bog standard'.
Box-standard, ffs. The end has already started.