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.

by potatoninja August 27, 2015

I-can't-believe-it's-not-twitter

Any one of the multitude of twitter-clones that pop up trying to make a quick buck as a networking site blatantly ripping-off twitter.

Person 1: Dude, sign up to twoggle! It will revolutionize the way you socialize! Haha, that rhymes hurrdurrdehurr...

Person 2: Man, how many times do have to tell you!? I don't partake in that I-can't-believe-it's-not-twitter faggotry no more.

by achey breaky shart June 15, 2009

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!

by Kaydaymuchluv81 December 1, 2011

i can't believe it's this lit.

When something is so good, or "off the chain" that it's lit.

You can't believe it.

*enters party*
I can't believe it's this lit.
*eats dank food*
I can't believe it's this lit.
*Puppy is being cute af'*
I can't believe it's this lit.
*Jan starts streaming with Gorm*
I can't believe it's this lit.

by GormHouj February 28, 2016

We Don’t Believe What’s on TV

A great song by Twenty Øne Piløts that helped me confirm that whatever Oprah says is bullshit.

Me: hey have you heard We Don’t Believe What’s on TV? Friend: yeah! It’s so good!

by Bandito394 June 1, 2019

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!

by Sionw October 14, 2018

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"

by The Teacher, PhD in swearing July 15, 2009