sink it in one

the process of ripping a bong or pipe hit in one breath and finishing the entire thing

Did you see Niko rip that bong before?
Yeah he managed to sink it in one

Sink a hot one

To smoke cannabis from a bong. Derived from the visual notion of cannabis in a bowl "sinking" as it burns and loses mass.

"Gonna go to Mike's and sink a hot one on his new piece."
"Wanna go out back and sink a few hot ones?"