messy

In a disorderly state; chaotic; disorderly.

a messy office

Jim ran his fingers through his messy brown hair.

Prone to causing mess.

He is the messiest person I've ever met.

Difficult or unpleasant to deal with.

a messy divorce

Say bonjour to the botched R.S.V.P. The practice of replying to invitations, let alone actually showing up to parties as promised, has become as antiquated as the chimney sweep, and much messier.

Argumentative, spreading spreading gossip, talking behind someone's back

They keep starting fights with Sam, they're so messy.