I need that like a hole in the head

I need that like a hole in the head, usually worded like I need that like I need a hole in my head is a phrase used when you want to say that you definitely dont want or need something offered to you or asked of you, usually spoken in a sarcastic way. By saying you need it like you need another hole in your head, you are saying matter-of-fact you absolutely do not need this thing being offered, since you definitely dont need another hole in your head.