1)n. Of or pertaining to something that was attained in crutial timing or just an overal good thing.
2)v. The most common use. The process of attaining something in crutial timing. Specifically, it can refer to "hooking up" with someone.
"Yea,it was almost sold out but I sniped the last ticket."
2) "Sup playa, did I see you makin' on some honeys last night?"
"You know it! I sniped some ass."