Hipster

Once again Rosa came home describing a game her friends play, called "hipster." The gist of the game, in her words:

"You pretend to be teenagers but don't have parents."
"You're really sassy."
"You can have powers. Like a plant fairy or you can fly and make metal or talk to ocean animals."

Why is it called "hipster"?

"Because they're so sassy, they put their hands on their hip."