The act of hooking up with a person usually for just one night or for a period of time but never being in a relationship with them.
Guy # 1: hey man what happened with you and that girl? you together now?
Guy # 2: naw man we met and we just snagging
Among Native Americans, a common term for hooking up.
We found Richie and Janet snagging in the back of his pickup outside the bar last night.