go on (with you)
idiomPart ofgo
go on (with you) — idiom
1. You say this when you think someone is not telling the truth or when you disagre
1.idiom
Definition
You say this when you think someone is not telling the truth or when you disagree with them in a friendly way.
Example
Go on with you, Sara didn't eat the whole cake by herself.
You think you can run faster than me? Go on with you!