do me a favour!
idiomPart offavour
do me a favour! — idiom
1. Used to show that you think a question or suggestion is silly or unreasonable.
1.idiom
Definition
Used to show that you think a question or suggestion is silly or unreasonable.
Example
Do me a favour! You think I'd believe that story?
‘Will he finish on time?’ ‘Do me a favour! He's always late.’