adj
filthy
FIHL-thee
adj
1
Extremely dirty.
"His boots were filthy after the muddy hike."
"The kitchen was left filthy after the party."
2
Obscene or offensive.
"He told a filthy joke that made half the room groan."
How to Use Filthy
Learner’s notesIn plain EnglishVery dirty, or, informally, obscene.
Common pairings
filthy rich
filthy joke
filthy floor
Word Forms
filthier comparative, filthied past tense, filthies singular, filthiest superlative
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Etymology
From Middle English filthy, formed from filth plus the adjective ending -y.