chipping
n.— «“I was just chipping,” Cross says. That’s a street term that means she’d use whatever drug she could get. “Coke, heroin, anything you can shoot, I was shooting it.”» —“Addiction Center set her on path to sobriety” by Valerie Zehl in Port Crane Press & Sun-Bulletin (Binghampton, New York) Sept. 18, 2006. (source: Double-Tongued Dictionary)