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an expression used during an event of important significance. Also used when exasperated. As well as in the case of what you had previously expected to take place does not. Exclaimation during a sudden realization.
oh tits!

Walking through a large crowded area
Person A - There's no way we'll make it through this...
Person B - Come on, follow me
Person A - Oh Tits! *Follows Person B*
by roflstomper October 14, 2007