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"