mind-boggling 

fantastic, tremendous, crazy

that car is mind-boggling

mind-boggling by sebastien deveraux May 14, 2005

mind bloggling 

something that is so mind boggling that the only way you can express how awesome it is, is to blog about it afterwards

Person A: "The ending to Fight Club was craaaazy. It was so mind boggling, that I wrote about it in my blog later that night. Spoiler alert! lolz"

Person B: "man, that's mind bloggling!"

mind bloggling by zoty January 23, 2011

mind-boggling 

adjective /ˈmaɪndˌbɒɡ.l̩.ɪŋ/ /-ˌbɑ .ɡl̩.ɪŋ/ INFORMAL

extremely surprising and difficult to understand or imagine:
She was paid the mind-boggling sum of ten million pounds for that film.

She was paid the mind-boggling sum of ten million pounds for that film.

mind-boggling by mi cielo April 30, 2014

Mind Boggling

adj. Informal
Intellectually or emotionally overwhelming

someone: We're not alone in this universe, b/c if we are, that would be a huge waste of space!

you: WOW that's mind boggling!

if that doesn't work for you go to:
http://www.mind-boggler.net/
LOL

Mind Boggling by John Jacob Jingleheimer Schmid December 31, 2008

Mind Buggling 

The feeling after David Blaine does a magic trick.

"That's absolutely mind buggling."

Mind Buggling by Ozymandias4 April 11, 2009

Mind booggling 

When mind boggling just ain't enough.

This posse cut is mind booggling!

Mind booggling by T-Lenious Monk May 3, 2011

mind-boggling 

Quite simple; mind + boggle = mind-boggling.
Originating from Douglas Adams book: The Hitchhiker's Guide to the Galaxy.

"The Hitchhiker's Guide to the Galaxy says that if you hold a lungful of air you can survive in the total vacuum of space for about thirty seconds. However, it does go on to say that what with space being the mind-boggling size it is the chances of getting picked up by another ship within those thirty seconds are two to the power of two hundred and seventy-six thousand, seven hundred and nine to one against."

mind-boggling by Aur January 26, 2005