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1.
An expression used on the computer meaning 'Oh my god, what the fuck' It is generally used to relate to crazy situtations, or when something random happens.

Popular phrase used by scene kids.
Sammy: My mum has totally gone psycho and stopped me coming out tonight
Katie: Omgwtfbbqsauce! That sucks!
by maddyxkisses April 17, 2007