originally derived from the Spanish "cállate el osico" which roughly translates to "silence your snout". A very crass way to tell someone to shut up. Often only used among very close friends.
owl or búho (español) - Owls are solitary, nocturnal birds of prey mostly hunting small mammals, insects, and sometimes fish. They have large eyes and ears, sharp hawk-like beak and claws, can turn their heads 180 degrees, and communicate with a hooting "who who" sound.
Britain's cheapest vodka brand, only available in Tesco stores.
It has become the staple alcoholic beverage of students and tramps across the United Kingdom, usually mixed with equally low budget soft drinks.
When exposed to freshers this beverage, above all others, has been proven to result in events of great hilarity and/or death.
Many theories surrounding the actual ingredients of this mythical elixir exist, it is most probably fermented primarily from the alcohol soaked clothing of dead Irish men - giving it that slight after taste of Guinness... and corpse.