The answer doesn’t appear on the webpage for some reason, but “skosh” is a very close approximation of the Japanese word “sukoshi”, meaning “a little”. The “U” is barely pronounced, so it sounds like “s’koshi” in Japanese.
True, actually comes from the Japanese, IE:
skosh "skosh\ noun [Jp sukoshi] (1952)
: a small amount : bit, smidgen — used adverbially with a <just a skosh bit shook — Josiah Bunting>
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