This means 1.that
time when
you are arguing with someone, or 2.if they are trying to argue with you, or 3.if
you are trying to argue with them.
1. "Can I
call you back
later? We're all rah right now."
2. "
Hey, what's up? Why are you so rah all of a sudden?"
3. "Shut up! I'm not being rah!"