mole hit

A traditional mole hit is when you sprinkle tobbaco on top of the packed bowl of weed before taking a bong hit.

Alternatively you can use mole hit to describe smoking pure tobbaco in any way that is normally reserved for weed, or just for mixing any two substances together.

Bratt: Yo, let's go to my room and take mole hits.
Chuck: What's a mole hit?