Gerbilling is an odd practice of inserting a small rodent (mouse, often) into a condom which is then inserted into the anal cavity, where the dying convulsions of the poor animal are said to produce a pleasurable effect.
The term is derived from a combination of the two practices.
As heard on the train platform: "Get outta the way, you fudge packing gerbiller!"
One who exhibits gay pride. The act of being gay. Not just "in the closet" gay but has to display a very flamboyant gayness that is normally seen at gayday parades or on "Will and Grace". A gayballer is also very promiscuous and will take it anywhere, anytime and from anyone.
Southwest Airlines executive:
"Male fight attendents are typically guilty of gayballing in that they all fuck each other from city to city in these mass gayballer slamfest orgies"