A sexual performance that includes a black light, some highligthers, and any sexual acts that result in the explosion of semen onto the ballsack which then glows due to the blacklight.
That slut Sharon is a wild one; she glowballed Drew all night long. Now his balls will never stop glowing.
by concerned house mate February 2, 2010
Get the glowballmug. by sharon2987 March 25, 2010
Get the glowballingmug.