Gun Jumper 

a women who rides multiple men at one time.

Me -"oh yeah you should a been there, we found this gun jumper of a girl, it was awesome."

My dumbass of a friend- "sweeeeeeet"

Gun Jumper by scarface447 October 2, 2010

jumped the gun 

You jump the gun when you start doing something before the appropriate time.

Sorry I jumped the gun by telling Carol the news before checking with you

jumped the gun by Domingo Mihovilovic November 5, 2007

gunhumper 

A hard-core gun enthusiast that always brings up the second ammendment to defend guns during mass gun killings. These people live, breathe, sleep with and hump their guns because they love them so much. The bigger the gun, the smaller the penis they have.

The ultra right wing of the Republicans and Tea Party crowd are the biggest gunhumpers of them all.

gunhumper by Bear-Bear August 15, 2012