random
Something unexpected and irrelevant, but often amusing. A very over-used word now, please people, use it when something really is random. See example below for a true example of random.
Holly: Sorry to hear your hamster died Bob...
Bob: Window cleaners for British rail should watch out for flying man-eating deckchairs today, swimming in from the south along with the flea-ridden coathangers. The calf needs the blinds shut due to his purple parrot problem, and the pet washing line needs a slap round the face for dropping the flying monkey on the "queen of the night" tulips. The muffin man is responsible for the sudden outburst of rain yesterday as he forgot to pay the rent on his blue strawberries. I'm sorry, did you say you wanted a biscuit?
Holly: Random! Custard cream please.