1. most dirty, muddy, or covered with muck; filthiest
Usage: superlative form of mucky

Examples

• After the storm, our backyard was the muckiest it had ever been.
• The muckiest boots were left by the door to dry.
• This is the muckiest pond in the entire park.
• The farmer’s clothes were the muckiest after working in the pig pen.
• We avoided the muckiest part of the trail after yesterday’s rain.
• The muckiest job on the farm is cleaning out the barn.