2010 #1 hit for Usher whose title comes from a texting abbreviation

• Text exclamation
• Texter's "Holy smokes!"
• Shocked shorthand
• Texter's "Heavens!"
• "u've got 2 b kidding!"
• Texter's expression of surprise
• "Unbelievable!" in a chat room
• "I'm shocked," in a text
• "Gee whiz!" in textspeak

Wikipedia Word definitions in Wikipedia
For other songs titled OMG, see OMG " OMG " is a song by American recording artist Usher and American rapper will.i.am , who also wrote and produced the song. It uses the auto-tune effect in several lines, as well as Jock Jams -esque sports arena chanting. ...