oi

noun

(sometimes capitalized) A working-class punk rock subgenre of the 1970s, sometimes associated with racism.

1. Said to get someone's attention; hey.

   Oi! Stop that!

2. An expression of surprise.

   Oi! This is new!

3. An informal greeting, similar to hi.

   Oi! How's it going?

interjection

An exclamation typically expressing mild frustration or expressing feelings of uncertainty or concern.

1. (representing rural dialect pronunciation) I.

   Sometimes oi sits and thinks, and sometimes oi just sits.