The act of a male ejaculating down a females throat.
That bitch gagged from that gland slam.
The act of having 4 orgasms in the four "glandular" zones of a woman all in one session. Namely. Vagina, Bum, mouth and tits.
Man. That bitch was so hot. By midnight I'd hit a Gland Slam and was headed for home. No extra innings!