When one slobbers all over a pipe, bong, joint, or any smoking device being shared by others.

The act of holding a cigarette in your lips enough to moisten the paper.

To put a ciggarette butt so far past your lips, you slobber on the butt.

–verb
1. to ruin a joint with spit.
2. party-fouling by using ones mouth sloppily.

Highly prejudiced description of placing ones' lips entirely around the open mouth of a bottle or canteen, thus opening the possibility of backwash.

Comes from an old stereotype that black people have lips that form a perfect circle and are thusly perfectly adapted.