The act of secretively leaving your home and going partying with others at a non disclosed location and returningsurreptitiously and mentioning none of it those at home on regular intervals having those around you puzzled as to where you always go and why!
Some domestic cats go gerbatronning at night too.
A derogatory term for anyone, or anything.
It's awesome, it's like the coolest word.
"You can't be out here swinging hockey sticks. You're not even supposed to be out here without skates." "You know what Charlie? He's right, only a couple of gerbronies would come out here without skates on."
"I'm not gonna do that. I'm gonna go out there and take a wicked slap shot, really make a name for myself. Otherwise i'll look like a total gerbrony."