a. When your smoking with a person/group of people and its your turn to hand the person the pipe/blunt. Instead of saying "here" or "take this" you say "snag it" or just "snag."
b. grabbing something from someone or for someone.
a. "Snag it man"
b. "Hey you want me to snag a 40 for you at the corner store?"
When you happen to see a girl and her breasts are mainly perky and large. They are usually known as breast implants but a little larger with a slight perk.
Trevor: yo did you see those Snag Tits on that girl??