1. more dirty or soiled with soot, grime, or dark particles
2. more indecent or obscene in content or nature
Usage: informal

Examples

• The factory workers’ uniforms grew smuttier throughout the day.
• His hands were smuttier after cleaning the chimney.
• The comedy show became smuttier as the night went on.
• She preferred cleaner humor to the smuttier jokes her friends told.
• The old building’s windows were smuttier than expected.
• The magazine’s content has gotten smuttier over the years.