Learn how to say Mussy correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word muss:
make (someone’s hair or clothes) untidy or messy:
the wind was mussing up his hair
[usually in singular]
a state of disorder:
no fuss, no muss—nothing left behind except a few little specks of dust
mid 19th century (also as a noun in the sense ‘disturbance or row’): apparently a variant of mess