When someone gets shot, people often say they got smoked, thus someone smoking on an "Opp" pack is literally saying they're killing them. Opp is short for opposition (enemies), while pack is referencing weed. When someone have a pack of weed, they might name it after a dead opp before they smoke it.
Yeah bro I was smokin da Jessica pack.
by XenxBTW May 26, 2021