A seat-shaped object leading to a pipe which, in turn, leads to the sewers. Used to dispose of bodily waste - though urine is often disposed of on the floor around the base of the toilet. A toilet is a source of much hilarity with schoolboys or those with similar ideas about humour (like me, for example). Also used in insults (eg: "you smell like a public toilet"). A toilet is a place the Queen never has to visit (through some
miracle of biology, presumably).
People who are sick in the toilet are said to be "talking down the big
white telephone". Although some toilets I've seen are so filthy their original colour is long lost in the mists of
time.
In my
old school someone took something out of a toilet and smeared it across a classroom wall. The teacher was adamant that the culprit would be made to clean it off. The guilty party was
never revealed, so the shat stayed on the wall and festered for years after. This was a classroom used as a lunch-hall. What a charming
school.