come on
英 [kʌm ɔn] 美 [kʌm ɑn]
(表示鼓励)来吧
You say 'Come on' to someone to encourage them to do something they do not much want to do.
Come on Doreen, let's dance.
快点儿;加把劲
You say 'Come on' to someone to encourage them to hurry up.
得了吧;算了吧
You say 'Come on' to someone when you think that what they are saying is silly or unreasonable.