Gasoline. Used in the UK and most of it's former colonies, sans the USA and Canada.
Oddly petrol is NOT short for petroleum.

Brit: Looks like we need petrol. We'd better stop at a station and fill up.
American: Looks like we need gas. We'd better stop at a station and fill up.
by GAWII May 20, 2008
Fuel used in conventional internal combustion engines. In North America, this is known as gas. Cf. Diesel, kerosene.
Where's the nearest petrol station?
by Paul March 26, 2004
mainly used outside the us though
Oi, we're low on petrol mate. Gotta find a station, quick!
by zomgwtflolbbq March 2, 2008
"I need to get some petrol first though, bro."
by SpencerMark April 28, 2006
A belief system based on pro petroleum policies and views.
OPEC practices petrolism for its own self-interests.
by jogils May 24, 2009
A guy who is overly obsessed with skate boards and lives at home with his mom, is bald, has a pony tail,is 36 years old, never took a bath in his entire life, and plays EverQuest on a skateboard shaped computer that he bought at a dime store for a quarter.
You're acting like a veeb named petrol. (see "Veeb").
by Another guy named John October 18, 2003