A beautiful drink. It's a non carbonated drink and is a product of The Coca Cola Company. Always on shelves around UK. Mostly seen as an alternative to water.
Cool person:Lunch break. Let's go down to Tesco and get some Oasis.
Cool person: Its an awesome drink, you tard.
Nerd: Im gettin some water.
Cool person: What the fuck? You need to be killed. Water is shit up to Oasis.