A fork of Rural Dictionary
<noun> 1) The point of orgasm during sexual intercourse. 2) The moment you smack your load all over your partner's body during a tit-wank or a hand job or something... 3) The point of orgasm in any situation, be it masturbation or otherwise.
1) "Oh darling, I have just reached my sexual zenith." 2) "Oh bitch-ass skanky ho, I be reachin' dat sexual zenith right now." 3) "Glen reached his sexual zenith as he pressed his jap's eye into the handkerchief."