come on 1. To convey a particular personal image: comes on as an old-fashioned reactionary. 2. Slang To show sexual interest in someone: trying to come on to me during the party. 3. a. To progress or advance in increments: Darkness came on after seven. b. To begin in small increments or by degrees: Sleet came on after one o'clock. 4. To hurry up; move rapidly. Often used in the imperative: Would you please come on! We'll be late! 5. To stop an inappropriate behavior; abandon a position or an attitude; be obliging. Used chiefly in the imperative: You've used the same feeble excuse for weeks. Come on!

Jennifer can best answer this question. She loves to say it all the time: "Come oooonnn!" lol :P Women say this to me all the time when they are inviting me into bed. They find that dark panthers are simply irresistible! :P

It means: "come on".

I read it as, "come on, come back to reality!" or "come on, join us!". See how it fits into Steve's and Jura's examples.

Steve answered your question very well. "Come on!" can also be used as an expression of disbelief. Person A: I have just bought myself a Mercedes. Person B: Come on! Are you kidding me? When?