Driving the white bus 

To vomit-more precisely to vomit into a toilet.

After consuming the most of a case of beer, Chad ran to the bathromm where john caught him driving the white bus.

Driving the white bus by mj_oblio June 17, 2004

driving the big white bus 

Puking up your guts into the toilet bowl while holding on to the rim with both hands to prevent yourself from falling in, while the room spins around and around.

After the party last night I went home and started driving the big white bus.

driving the big white bus by PeeBee February 17, 2004