Third-person singular simple present indicative form of muss

(transitive) To rumple, tousle or make (something) untidy.

A mess (disagreeable mixture or confusion of things; disorder) / (obsolete) A scramble, as when small objects are thrown down, to be taken by those who can seize them; a confused struggle.

(obsolete) A term of endearment.

(slang) "must be"; A response in the affirmative, by people such as disgruntled workers, to respond to a question that does not interest them.

present participle of muss

simple past tense and past participle of muss

(informal) No complications or hindrances.

(obsolete, slang) To treat roughly. / Used other than figuratively or idiomatically: see muss, up.