From muss + -y.
mussy (comparative more mussy, superlative most mussy)
- having been mussed, messy, rumpled.
African-American dialect pronunciation of mercy.
mussy (countable and uncountable, plural mussies)
- Eye dialect spelling of mercy, representing African American Vernacular English.
- 1937, Zora Neale Hurston, Their Eyes Were Watching God, Harper Perennial (2000), page 170:
- God have mussy!