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A key warning given to the student during "health and safety at work" courses about being environment aware, in order to avoid bodily injury caused by tripping or bumping into an unseen object.

A distraction caused by spotting a stunningly good looking member of the opposite sex, resulting in the observer walking into a lampost, tripping over a kerb etc.
Simon: Dude, look over there! Trip hazard at eight o'clock
Andy: Wowsah! <Crash>, oowww fuck!
by simon jacobs April 15, 2008
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Jul 12 Word of the Day
The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.
Message: "i'm free this afternoon so come over and fuck me senseless, my parents will be out all day"
Recipient: Mum
Message Sent
- Onosecond occurs here -
by Jimmed September 26, 2006
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