OH SNAP 

(exclamatory phrase) a playful indication of surprise, misfortune, or insult

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.

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.

Ben: OH SNAP!

OH SNAP by DT June 14, 2004

Oh Snap 

First known usage was by the 1980's rap song "Just a Friend" by Biz Markie. Its a "rated G" way of saying "oh shit"

So I came to her room and opened the door
Oh, snap! guess what I saw?
A fella tongue-kissin’ my girl in the mouth,
I was so in shock my heart went down south
So please listen to the message that I say
Don’t ever talk to a girl who says she just has a friend

Oh Snap by Leandro October 30, 2004

Oh Snap 

Commonly Used By Dave Chappelle, the phrase is an exclamation of surprise, reget, dissapointment, happiness, and many other emotions.

{Driving in a car and almost hitting a big animal}

"Oh Snap!"

or

{Having your ice cream cone fall on the ground right after buying it}

"Oh Snap"

Oh Snap by Eric August 18, 2004

oh snap 

an expression used to convey a feeling of exclamation

Oh Snap! I forgot, today is our anniversary!

oh snap by Thomas Lyons February 19, 2004

Oh SNAP 

People usually say "Oh SNAP!" as an exclaimation, and it can be either positive or negative.

Positive: "Oh SNAP i aced the test yo!"
Negative: "Oh SNAP i forgot to pop the popcorn!"

Oh SNAP by Bluestrike February 13, 2010

oh snap 

What some of the stupidest people I have ever met say after they crack "mom" jokes.

Person 1: I fucked your mom.
Person 2: Oh, Snap!
Person 3: GOD, you guys are such MORONS I hope you fucking DIE.

oh snap by supaDISC December 9, 2004

oh snap 

according to Leo:
oh snap is when you throw a cheerio in a bowl of rice krispies


you have a O and a Snap

oh snap son.

oh snap by T-ori Ceeeeno October 15, 2008