ragamuffin

US /ˈræɡ.əˌmʌf.ɪn/
UK /ˈræɡ.əˌmʌf.ɪn/
"ragamuffin" picture
1.

a person, typically a child, in ragged, dirty clothes.

:
The little ragamuffin played happily in the muddy street.
He looked like a true ragamuffin after a week of camping.