めちゃめちゃ

very; extremely (more than めちゃ)

Word type: 

Standard: 

すごく

Standard kanji: 

凄く

Example: 

この本、めちゃめちゃおもろいで。読んでみぃ。
This book is really very good. You should read it.

Commentary: 

This short phrasing is more common among young people.

Also see めっちゃ and めちゃ.