1) It means to hurry up "Come on! Let's go! We're already late." 2) It is used as a form of encouragement. "Come on! You can do it. Just another 100 meters to go." 3) If something comes on, it means that it is switched on. "We got there at eight, but the lights didn't come on until fifteen minutes later. 4) In slang, it can be used as a noun meaning some kind of lure to get you to do something or interest you in it. Usually it is a negative term, meaning a false promise. Some people will write it as one wore - comeon, but it is incorrect. "She went to see the car advertised on sale, but she found that the advertisement was just a come on. The car was not available and the salesman tried to sell her something more expensive."

One day.A pair of lovers in shopping mall,the man saw a goods inexpensive,so he want to buy more,but he lover say"hi come on"and then ,they leaving..no buy the goods any what`s mean of the "come on"

Can you provide the context? "Come on" has different meanings in different situations.