Let's back up a little. I'm sure I'm much older than you are, but even when I was miles younger, I couldn't laugh when I wasn't sure what others were talking about. "Hinty eyebrows" have been around for centuries, Groucho Marx became famous for his 'hinty eyebrows' and eye rolls. Sometimes you have to bite the bullet and just say "what are you trying to say?".
No one wants to be a buzz kill, but with all the silly hinty eyebrows sometimes rumors are started that have no basis in reality. Think about this, if another group of young people were mentioning you "with chuckles and hinty eyebrows" how would you feel? A tad embarrassed about ???? that you don't understand? Respect yourself and respect others. Don't join in on irresponsible twaddle about others, it's unbecoming. Stay strong and honest.