Muss

·noun A term of endearment.

II. Muss ·vt To disarrange, as clothing; to Rumple.

III. Muss ·noun A state of confusion or disorder;

— prob. variant of mess, but influenced by muss, a scramble.

IV. Muss ·noun A scramble, as when small objects are thrown down, to be taken by those who can seize them; a confused struggle.

muss
A corruption of mess, a state of confusion; a squabble; a row. This vulgarism is also common in New ...

Dictionary of American Words And Phrases by John Russell Bartlett.