Gruntflip sounds dangerously close to cuntflap.
Anyway I'm about to turn 30, but it's not like I was ever one of the cool kids. As a teen/young adult I was a dork. (still am, it's just that when you're an adult no one gives a shit)
So I've instead been watching the evolution of the inscrutable language of young people from afar for a very, VERY long time.
Plus they could announce the rebrand by replacing the weird dog chewing on a brush with the same weird dog lifting weights
Hitting the GIM.