So, I am 17, and I have noticed that a big portion of my class is sometimes randomly pointing and giggling about me.
(Including the girls.) I am not overweight or anything, but they know that I play Growtopia, which nobody else does.
I think that me playing Growtopia makes them laugh behind my back, giggle at me.

I have ignored it to this point, since I don't really give a flying f about them, I can play whatever I want.

They sometimes say "Growtopia is cancer and for little kids" (Which is not true, it is for all age demographics).

If they really want to spend their time laughing about a person playing some game, they must have a entertaining life.