How to use "messy" in a sentence

They both look similar: messy blond hair under hats that are the same colour as their khaki shorts and shirts

"Eat takeout food at two hundred miles an hour in the Batmobile, and no matter how messy it gets - just hose off later."

Apparently, Billy liked his view of the world to be as neat and uncluttered as everything else about him; if he started believing in ghosts, he'd have to reconsider his opinions about a lot of other things too, and then life would become intolerably messy.