i can't believe you searched this! don't you have anything better to do?? anyway, this is something people type when they are super bored (and/or super dumb) and want to see what happens when they type exactly what is already in the search bar. 

This is the definition of Type any word... this indicates that if you somehow found this definition for a definition that, you are indeed insane.

I can't believe you searched this! Don't you have anything better to do?? Anyway, this is something people type when they are super bored (And/or super dumb) and want to see what happens when they type exactly what is already in the search bar. is the def

i can't believe you searched this! don't you have anything better to do?? anyway, this is something people type when they are super bored (and/or super dumb) and want to see what happens when they type exactly what is already in the search bar. by MERC907 May 3, 2018

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.

i can't believe it's this lit. by GormHouj February 28, 2016

ah fuck, I can't believe you've done this. 

A statement of frustration said when one is about to say something and is interrupted abruptly; usually with a punch to the face.

Note: It has to be said in a non-enthusiastic, brittish, calm and polite manner, if you will.

Example:

Some guy: "Hello everyone, i'm here today to talk about... *PUNCHED IN THE FACE*

Same guy: "Ah fuck, I can't believe you've done this."

ah fuck, I can't believe you've done this. by JoãoPaulo November 13, 2007

Ah fuck. I can't believe you've done this. 

Best response to being punched. Ever.

Guy #1: *Punches Guy #2 in the face*
Guy #2: "Ah fuck. I can't believe you've done this."

Ah fuck. I can't believe you've done this. by liMPiNMEdiC January 6, 2008

i can't believe you've done this 

Something uttered by British people after they've been suckered punched. Usually preceded by the exclamation "Aw fuck", and accompanied by a look of complete bewilderment.

British guy: Blah Blah Blah Blah
British guy's friend: *punches British guy in the face*
British guy: "Aw FUCK, I can't believe you've done this!"

i can't believe you've done this by Susake December 1, 2007

I Can't Believe You've Done This 

the new meme, originating from the infamous youtube video

http://youtube.com/watch?v=8lBO23Dh23I

pete: hey, say thanks to your mum for me
sam: aw fuck, i can't believe you've done this

I Can't Believe You've Done This by crincled January 8, 2009

Ah Fuck I can't believe you've done this 

Expression of anger after someone has annoyed you

"Ah fuck I can't believe you've done this Barry why did you break my mum's lamp."

Ah Fuck I can't believe you've done this by Anti-hypofritz February 26, 2017