Magnifantastic 

Someone who is so amazing and incredible that no known adjective can describe them. This word is used when you are so happy with someone, that you can't even think of a word to call them.

Man, my girlfriend Abigail is soooo magnifantastic! she just makes me so happy all the time, and is just such an amazing person.

Abigail you're....whats the word? MAGNIFANTASTIC!! I can't believe how awesome you are!

Magnifantastic by Abix forever June 24, 2011

magniftastic 

being magnificent and fantastic at the same time(although it's highly unlikely)

It was magniftastic when josh was playing halo 2 and he killed everyone on the playing field and caused the xbox to implode taking everyone with it.

magniftastic by AntiChrist June 23, 2006

Magnafantastical 

So horrendously magnigicent that the fantasticality of the over all stupendosity is wretchedly indefinable.

Oh lord that girl's booty is Magnafantastical!!!

Magnafantastical by Zoe April 10, 2005

Magnifitastic 

An insane combination of magnificent and fantastic. When a person is (almost) infallible and awesome in every single way, they may be referred to as "magnifitastic".

Brecht's performance at the karaoke bar yesterday really was magnifitastic! I've never heard anyone sing as divine as he does! And then afterwards he stopped that bar fight as well, there is no comparing to that guy.

Magnifitastic by TheBlueFairy February 12, 2014