Best one-liner you said/received as a counter argument?

Just for fun. Share with context of argument.

Can be embarassing, sexual, witty or humiliating.

My favourite is when someone tries ro be extra smart on things we all know they know nothing about or enters my area of expertise, I use

Dont teach your father how to fuck or wisdom has been chasing you, but you have been faster.

Whats yours?

Best one-liner you said/received as a counter argument?
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