hello?
what is a dirty opening?

Off the top of my head, I can't remember how to post a game.
I would guess that he means an unsound gambit? Or maybe some super passive and "boring" opening? Honestly, I think only he would know.

https://www.chess.com/game/live/14577985933 this is the game I was talking about.
So,I just played against a guy, and right before he left, he said that I use dirty openings.What does that mean? I would put the game in this post, but I don't know how to.Can someone explain to me both of these things?