1. superlative form of plashy; characterized by splashing or making splashing sounds; wet and muddy
Usage: informal; chiefly British

Examples

• After the heavy rain, the plashiest parts of the field were near the stream.
• The children ran through the plashiest puddles in their boots.
• That was the plashiest walk we've ever taken through the marsh.
• The plashiest section of the path made every step sound like a splash.