Dude, the fact that he keeps calling him uncle weirds me out lol

Dont worry about it. Its normal in Asian culture to refer to older individuals by uncle/aunt out of respect and courtesy

it’s like saying sir to us

Or like saying sempai

senpai means upperclassmen though;;;

I Meant that him calling him ajusshi is another way for you to address an older male, It doesn’t necessarily translate to Uncle. Which is similar to sempai which refers to Someone who is more experienced in either school or a work position than you. I just didn’t feel like explaining everything my first comment which I understand can be confusing.

Well in korean, sunbae is the same as senpai and hyung/oppa would mean older brother. Ajussi means middle-aged man or uncle which is why it weirds me out.

Out of pure curiosity, it the implication of a perhaps larger age gap that makes it weird for you or is it because you're more used to "uncle" being more familial in usage?

Honestly, both.

Ohhh, I see I see. Cultural differences really stand out in contexts like this so I can't blame you.