It means uncle, although in anime character regularly use it in its less formal form where it functions more as "mister" or "sir." It's just an informal, but not necessarily rude, way to refer to an older man than yourself that you're unfamiliar with.

That's all I wanted to get clear. Most definitions stop at uncle and barely explain the secondary, and probably more common, use for it. "Ojisan" always means "sir/mister" unless they're actually they're uncle.

A term used to reference cannabis/marijuana/weed.

Japanese for Uncle. Not to be confused with Ojiisan, which means Grandpa.

Ojisan literally means Uncle in Japanese.

Can also be used as a slightly impolite way to address a middle aged man, similar to the English "Mister".

The name for an old man.

Old-fashioned people lack of knowledge for IT tools (SNS is exceptional) and gender equality.
If you have a/some ojisan in your team, your work will be more than double.