I frequent the bars and poolhalls in my area weekly. The name pool hustler or simply Hustler has stuck with me since I was a teen, when I got addicted to the game. But I was hanging out with some known shooters when a guy shouted to me "what's up pool hustler??" And my friends looked at me like I should of taken offense by him saying this. So is it better to be known as a gambler or hustler??? I've done both and enjoyed both but don't know the right answer here.
It sounds like you were out for an evening of pocket billiards with over half of the respondents to this post.
If you don't like it, what can you do ? You said yourself it stuck so just let it go. If your banker or family starts calling you that then I would start worrying about it.