Combination of the 2 terms trap and phoneline. It’s the phone line or cellular connection that individuals who work in narcotics trade use to do business with their clients.
I rid (sold) so much that I killed off my trapline
When someone has a bunch of girlfriends or boyfriends lined up all over the place but isn't making a move on any of them because they are keeping their options open.
"Oh Jane's gone for the weekend to check on one of her men on her trapline."
Trap life is a way of life. It is a religion of its own. When one enters the trap life there is no going back. As many religions attempt to reach a state of enlightenment the trap life also encourages one to reach their inner ultimate trap lord/queen. Selling dope not hope. Making racks by selling rocks. Always staying strapped and Learning to adapt.