A term used to reference a toilet, in the manner of porcelain pony. The term is most often employed in reference to the use thereof.
by Bob Trees May 11, 2006

Name given to the toilet when vomiting, used in reference to holding the seat while spewing in the same manner as you would hold a bus steering wheel. Not to be confused with the porcelain pony as quoted above
by timb082 February 05, 2009

by Ima.AssOe June 21, 2014

Vomiting into a toilet -often violently and for an extended time- whilst holding its rim like a steering wheel.
Australian Prime Minister, Kevin Rudd, when asked at a press conference about his recent bout of food poisoning: "Yes, I was driving the porcelain bus half the night."
by Ozymoron October 02, 2009

Spewing into the toilet. You are on your knees and your hands are on the bowl(steering wheel). People who drive the bus are usually drunk and drive it very cautiously, they hold onto the steering wheels firmlyx
Did you hear mum driving the porcelain bus last night? It kept me awake for hours! Dad said she was drinking spumante- i guess she got the desired result.
by timbo6969 January 03, 2017

When you've had too much to drink, and you wind up with two hands on the opened toilet in a kneeling position puking your guts out.
by Ralph, the bus driver January 03, 2004

puking into the toilet.
by Nick D February 13, 2003
