Definition of matty in US English:
matty
adjective
Especially of hair: matted, tangled. Of an animal or person: having matted hair.
Origin
Early 18th century; earliest use found in ‘Nestor Ironside’ (d. 1752), poet and Church of England clergyman (real name Samuel Croxall). From mat + -y.
Pronunciation
matty
/ˈmati/