An exclaimation, meaning that you are suprised in a good way.
Oh! It's my long lost brother Leo!
by Zach G. November 15, 2003
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Interjection. Usually exclaimed as one

1. Realizes something they didn't know before.
2. Has newfound pity on another poor sap.
3. Feels frisky.
4. Reaches orgasm.
5. Listens to Nelly's "Hot in Here"
6. Sees something astoundingly disturbing. Usually while cringing back in surprise.
7. Needs to get attention in order to say something.
Oh! I forgot to tell you...

-You know, I'm naked underneath all these clothes.
-Oh! You are, aren't you?
by SylfaenFlow November 17, 2003
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no real definition just said in a reflex phrase
such as:
by why do you need to know September 18, 2005
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oooooohhhhhh yes yes harder harder
by Shibby September 20, 2003
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It actually means my heart just got ripped into a million pieces but I won't tell you because you wouldn't care how I feel anyway.
Elizabeth: I love you.
Isaac: I know that but I'm not ready for it yet

Elizabeth: Oh.
Bystander: That's harsh.
by 5secondsofserenity June 28, 2014
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What you say when you just received sad/troubling information and your world is falling to pieces but you can't describe it.
-I have a girlfriend, sorry
- Oh.
by Lucky Haze November 5, 2017
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