Definitions by WojtasNi

Back pill 

A colloquial term referring to cannabis-containing edibles. Coined c. 2016, the term hints at the fictional medical problem of Cold Back but is motivated by the proposed pain and tension relieving medicinal properties of cannabis.

With a modifier, can also be used to describe cannabis vapor (air back pills), joints (tubular b.p.), or tincture (liquid b.p.)

In popular culture:
"I've got to eat so I can take my back pills!"
-National Lampoon's Christmas Vacation (1989)

"Man, I love camping but sleeping on the ground really makes my cold back flare up. It's good that we brought all these back pills to help."

"I'm having trouble falling alseep. Do you have any tubular back pills on you?"

Back pill by WojtasNi May 20, 2019