Filthy/ˈfɪlθi/ Definition 1 of 3Pro Tip 1/3Intensity Use 'filthy' to express a strong degree of dirtiness, more than just 'dirty'. After the hike, our shoes were absolutely filthy. Pro Tip 2/3Negative Emotion 'Filthy' can imply disgust or disapproval beyond plain dirtiness. He left his filthy laundry on the floor for days. Pro Tip 3/3Not Always Literal Sometimes 'filthy' is used to exaggerate for effect, not to describe actual filth. You've been playing video games all day? That's filthy!