1. superlative form of grimy; most dirty or covered with grime
Usage: informal; common in everyday speech

Examples

• The grimiest part of the factory floor hadn't been cleaned in months.
• After working in the garden all day, his hands were the grimiest I'd ever seen them.
• The old subway station had the grimiest walls covered in years of dust and soot.
• She wiped down the grimiest corners of the kitchen cabinet.
• That's the grimiest shirt you own—please wash it before wearing it again.
• The mechanic's grimiest tools were soaking in solvent overnight.