What is the meaning of ша?

ice

self, oneself (reflexive pronoun)

ice

The name of the Cyrillic script letter Ш / ш.

shush!, shhh! (be quiet!)

what!? (surprise, indignation, disgust, excitement or just arrogance) (spoken in Odessa, also in multiple other contexts)

The Cyrillic letter Ш, ш.

Misspelling of ш'а.

Source: wiktionary.org