[fil-thee] 
adjective, filth⋅i⋅er, filth⋅i⋅est, adverb, verb, filth⋅ied, filth⋅y⋅ing.| 1. | foul with, characterized by, or having the nature of filth; disgustingly or completely dirty. |
| 2. | vile; vulgar; obscene: filthy language. |
| 3. | contemptibly offensive, vile, or objectionable: to treat one's friends in a filthy manner. |
| 4. | (of money) abundantly supplied (often fol. by with): They're filthy with money. |
| 5. | to make filthy; foul. |
| 6. | filthy rich, outrageously wealthy; very rich. |
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