Toothing?
Those wacky Brits are at it again:
'Toothing is a form of anonymous sex with strangers - usually on some form of transport or enclosed area such as a conference or training seminar. 'Toothers meet by first connecting suitable equipment - such as a modern phone or palmtop computer. Users 'discover' other computers or phones in the vicinity and then send a speculative message. The usual greeting is: 'Toothing?'.
That's from the toothing f.a.q. from the official toothing BBS. So how long until toothing reaches your town? (thanks Kat)
web address: http://suicidegirls.com/news/culture/928/Toothing/