What does I do not know and OMG mean?

IDK means "I don't know" and OMG means "oh my god/gosh."

It's internet slang. People use it in IM's so they don't have to spell all the Words out. More Internet slang phrases are: ik, ttyl, ttfn, brb, l8r, g2g, & pos.

• Ttyl- talk to you later.
• Ttfn- ta ta for now.
• Brb- be right back.
• L8r- later.
• G2g- got to go.
• Pos- parent over sholder.
• ik- i know
• rofl-rollinq on floor laughin
• lmao-laughin my a.ss off
• lmfao-laughin my fuqkin a.ss off
• omg-o my gosh
• omfg-o my fuqkin gosh
• lol-laugh out loud