Completely off-topic, but the phrase is didn't cut muster, not didn't cut the mustard.
And completely untrue - well, maybe not untrue, but questionable ;)

O. Henry coined the phrase "cut the mustard" in the early 1900's. Some linguists think that it's a corruption of "cut muster", but others think that it is about the mustard.

Obligatory google link

In reply to Re: (OT) english idioms by Anonymous Monk
in thread PAUSE problem by jacques

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