tussle

(noun) disorderly fighting. Synonyms: hassle, scuffle, dogfight, rough-and-tumble.

(verb) fight or struggle in a confused way at close quarters. Synonyms: scuffle. Example: "The drunken men started to scuffle."

(verb) make messy or untidy. Synonyms: muss. Example: "The child mussed up my hair."