"Glueballing" refers to the practice of applying hair gel to the penis and pubic hair prior to intercourse. The result is that both parties become "stuck" to each other at the point of genital contact. Those who engage in this practice either find the act of getting "stuck" directly pleasurable, or they indirectly take sexual pleasure from the painful sensation of genital adhesion.
The act of forcing a "gleeballs" on someone, thereby making the act not as gleeful, but entirely glumful. Gleeballing is the homosexual act of stroking/raking your scrotum across the smiling face of your partner. Glumballs is the same act, but without the smile.
Friend 1: "I've never been sadder as that time I was gleeballed..."
Friend 2: "How the hell were you gleeballed if you didn't enjoy it? Did he hold you down? Were you not in a gleeballing mood? Dude, you totally got some glumballs up in there... ya better recognize!"