Imnotbased's definitions
The act of being popular and to cool. Doing drugs and never giving a fuck because you are so fucking popular you dont care.Only yumpers may go, or be yumping.
by Imnotbased November 6, 2012
 Get the Yumpingmug.
Get the Yumpingmug.  Get the Yumpingmug.
Get the Yumpingmug.