Could have fooled me Meaning in English
expression
Definition
An informal and often sarcastic expression used to say that something is very surprising or unbelievable, or that you don't believe what was said or shown.
Usage & Nuances
This phrase is informal and often sarcastic, usually when something is clearly untrue or unrealistic. Used in spoken English, sometimes to gently mock or express disbelief. Not appropriate in formal situations.
Example Sentences
"He's always on time." "Could have fooled me!"
basic
You said the weather was nice—could have fooled me!
basic
That's a real diamond? Could have fooled me.
basic
She says she loves early mornings—could have fooled me, since she always sleeps in.
natural
Wow, you call this clean? Could have fooled me.
natural
My boss said our team is the best in the company—could have fooled me after last week's mess.
natural