The British/Irish term for Molotov Cocktail. A glass container, such as an empty beer bottle, which is filled with gasoline. The opening is plugged with a piece of fabric, which keeps the gasoline contained and also serves as a wick, to be lit prior to throwing at its intended target.
About 60-100 IRA (Irish RepublicanArmy) members launched an attacking on police vehicles by attempting to overwhelm them by launching their large cache of Petrol Bombs at their armored vehicles.
This is the act of shoving your cock as far into the mouth of your partner as you can and shooting your wad straight down her throat, like your filling the car up at the Petrol Pump. You must also tap your cock against their bottom lip after you have cum and then shove her panties into her mouth like you are putting the Petrol cap back on.
You: I Petrol Pumped Becky last night and almost made her choke.