This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
稰 combines 禾 (grain) with 胥, which likely contributes a phonetic element. The exact historical development and original meaning are uncertain.
The left side is grain 禾, and the right side 胥 is a rare shape. Without a known meaning, picture a mysterious grain that has no clear name.
For ショ, imagine a show where a rare grain is displayed, but no one knows what it is: show -> ショ.
—