When someone goofs so you go absolutely batshit crazy on them. Typically used on retail employees when they act and/or treat you like a fucking idiot.
Person 1: Did you see her yell at that Walmart cashier?
Person 2: Yeah, she was going Janeen on them!
Person 2: Yeah, she was going Janeen on them!
by skehjgwg September 8, 2019