A misspelling of "omg" that was backronymed to mean "Oh, hi God", as if a child discovered stealing a cookie. Usually said when one is in the process of doing something the lord would look down upon, such as watching certain late night films.
Person 1: Hey, Hot Tub Fun Times is on. I know its your favorite.
Person 2: OHG
Friend 1: "Do you think we should burn boneless children?"
Friend 2: "Why not eat it? What's wrong with it!?"
Friend 1: "I would rather not eat it..."
Friend 2: "OHG I just realised it says children and not chicken :0 I thought you meant like chicken breast"
Friend 1: "pahaha :D"
A reaction to any offensive, puzzling, or comical event.
(When saying this word, make sure to raise the pitch of your voice throughout the entire word)
"I saw this kid walking down the hallway without any trousers, and I was like, ‘Fuckshitmotherfucker-ohgodamit!’"
Jimmy Febitze was being called a pansy in interior design class. After an insult was thrown his way he yelled, "Fuckshitmother-ohgodamit!"
Slippery told his friend Pete a very funny joke, in reaction to the punchline, Pete let out a shrill "Fuckshitmothrfucker-ohgodamit."