Green’s Dictionary of Slang

1. (drugs) to smoke marijuana through a bong n.¹

1979		Lette & Carey Puberty Blues 97: If we didn’t bong it [marijuana] we smoked it in a joint.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Bong on. To smoke hashish or marijuana.
1995		in L. Stavsky et al. A2Z.

2. (US) as sense 1 but with the intoxicant being beer and the equipment a beer bong under beer n.

2012

M. Lacher On the Bro’d 10: Carl and Derek rolled into parties together, bonging brews.