Another example of oh or a surprised reaction over a texted or during a game. Can be used in real life also but mostly in a typed way.
“She smells like hotdog water” she typed “Oi-“ I typed back
To grab some ones attention with British /Roman slang
Oi , you lot
Oi can be used when referring to a person, it is a replacement for the word 'you'.
Sup 'oi' what are you doing?