Amongst my circle of friends and other young people I speak to (around the NW of England btw) "random" is used in two ways:
1: Adjective denoting something unusual, say if we were all sitting in the pub and suddenly the Dali Lama walked in unannounced, somebody would most probably utter "Random." inbetween sips of Fosters.
2: (noun) A stranger involved in a one-night stand. "Who Bob shag last week, was it Bill's sister?"
"Nah, just some random."
In America, inarticulate people with nothing to say will use "random" as a filler just about anywhere. But it's most common when someone means to say "x is strange" or "y is absurd", mostly. the very worst abuse of "random" here is when someone says it when they mean to say that something is an uncanny coincidence. as in "i was just reading x's book and i saw him on the subway AND at the restaurant--that is sooo random."
i fucking hate that, too, Mr. Tea
oops i'll tack "lady sov" on here to seem relevant
PS EMUSICPRODUCTIONS whatever, stop fucking hawking your myspace page and your personal projects. No one cares about adding bands on myspace unless they'rer 1) your friends, or 2) you find them hilariously bad and/or wonder how on earth that new age reggaeton fusion artist with one tape-recorded track found you and approve them for kicks until their trillion bulletins a day annoy the shit out of you and you delete them.