i can't believe it's not butterface 

A girl who you think has an unattractive face until you finally see her up close and are pleasantly surprised....

"Joe dude I thought that chick was a fuckin ugly cunt, but she actually had a I can't believe it's not butterface."

i can't believe it's not butterface by Kyle JC January 13, 2008

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!

I STILL can't believe it's not butter! by Chesspiece#1 July 6, 2010

I can't believe it's not but-her face. 

When a person has a killer hot body but person's face isn't even good enough to be a butter face.

Ed: She's got a serious body on her but she's got the worst case of but-her face I've ever seen

Dave: Dude, she's got an I can't believe it's not but-her face.

I can't believe it's not but-her face. by hcd631 June 29, 2011

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.

I can't believe it's 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.

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

I can't believe it's not butter! by Kaydaymuchluv81 December 1, 2011

IT'S A BONUS! BELIEVE IT! 

A phrase originating from the video game Naruto: Clash of Ninja 2. The second half of the phrase originates from the phrase Believe it!. Originally used on the extras menu, it is used as an over enthusiastic response for something that one would not consider a "bonus" at all.
It is commonly used as punchline in a joke involving someone about to receive or do something somewhat desirable (engage in intercourse, win a prize on a game show, make a purchase). The second person mentions something very undesirable in addition to the initial object/act. The first person indicates their displeasure, while the second exclaims the phrase.

1: Congratulations! You've won a brand new car!
2: OMFG! This is the greatest day of my life!
1: But you'll have to time to use that car, as you've won a trip to maximum security prison!
2: WHAT?!
1: IT'S A BONUS! BELIEVE IT!

IT'S A BONUS! BELIEVE IT! by Cube B September 1, 2007