I can't believe it's not butter!

A butter substitute made of vegetal oils and frequently used as a spread. Sometimes its name is used as a humorous/sarcastic reference to a sub-par substitute to something.

<Eats a piece of toast>
- Just a moment, is it butter?
- No, it is "I can't believe it's not butter!"
- Well, *I* can believe it is not butter.

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I can't believe it's not butter!

The exact opposite of a butter face. A girl who has a great face but not a good body.

I diagnosed myself with I can't believe it's not butter! I so need to start working out!

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I can't believe it's not butter!

A popular phrase to say when you are currently in denial that what you have been served on your warm toast is not butter, but rather, margarine.

The phrase became especially after a brand of margarine used it as their name, to show just how their margarine was more similar to the real thing, however, now it's pretty normal that margarine tastes like butter.

Person A: This toast is so tasty. What is the brand of butter you use?
Person B: That's not butter, that's margarine.
Person A: What? I can't believe it's not butter!

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I can't believe it's not butter

Insult used with somebody's name, used if the person has man boobs

"Whoa, you see that guy's man boobs?"

"Yeah, I can't believe it's not butter"

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I can't believe it's not butter

is when you see an ugly person that has some how made themself look attractive through clothes, make-up or other non-plastic surgery enhancement. To test this on someone after a few cocktails (less than three) consider if you would park the love rod in the ham wallet. If yes: "I can't beleive its not butter!" - if no: see fugly.

"Wow, have you seen what Sally is wearing? She's sort of cute now."

Yeah, I know! I can't believe it's not butter!

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I can't believe its not butter face

A girl who is so ugly you can't bare to look at her. But her face is actually not that bad.

Rob "Yo check out that huge b*tch"

Dimitri "Wow shes huge but her face isn't that bad"

Greg "Holy shit she's got an I can't believe its not butter face"

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I STILL can't believe it's not butter!

What Peter Griffin likes to say at random times, usually after other characters say "I can't believe..."

Meg: I can't believe I'm still jealous.
Lois: I can't believe I touched him.
Peter: I still can't believe it's not butter!

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