(exclamatory phrase) a playful indication of surprise, misfortune, or insult\r
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popularized by Tracy Morgan of Saturday Night Live, OH SNAP is seemingly derivative of [oh no you didn't] where an insulted person, for example a guest of Jerry Springer or often a spunky African American woman contends the insult being made against him/her. While derivative of "oh no you di-int," OH SNAP has more of an emphasis on playfulness and can be said by people other than those being insulted.\r
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see also: [OH ZIP]
> Ted: Man, where you been all afternoon?
> Darrin: I had to stop off at your mom's place for a [nooner] that last a bit longer than expected.