Not neat and tidy; sloppy.
Consisting of or covered with slop; wet and splashy; muddy; slushy
Squalid or filthy; run-down:
Given to keeping things clean and in order:
Find another word for messier. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for messier, like: untidier, sloppier, dirtier and tidier.