Often seen used in tweets made by kpoppies after BTS have once again achieved something no other Korean group has or when BTS rapline destroys their faves with just a few words without mentioning any names.
"Just because your group..."
"Just because your faves..."
"Just because that group has xyz awards doesn't mean that no one paved the way for them..."
"I'm not talking about a specific group but just because someone charted no.1 on bb200..."
Meaning that if you already have a girlfriend/lover, doesn't mean that you can't check out other girls.
Guy #1: Hey look at those chicks over there!
Guy #2: Buddy, I already have a girlfriend.
Guy #1: Just because you're on a diet, doesn't mean that you can't look at the menu.
Guy #2: I suppose you're right. *Gazes at girls for 5 minutes* Damn! This is like Baywatch!
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.