(Australia (chiefly Queensland), informal) The edible mud crab or mangrove crab (Scylla serrata).

Cover or splash someone or something with mud, make water or another liquid cloudy or turbid, confuse or muddle someone's thinking, damage a person's reputation, make a color dirty or dull, complicate or make a mess of something, contaminate or make something impure, and cause someone or something to become stuck in mud.

Become covered or splashed with mud, become dirty or soiled, become cloudy or turbid, or become contaminated or impure.

Covered or splashed with, or full of, mud (“wet soil”).

Of water or some other liquid: containing mud or (by extension) other sediment in suspension; cloudy, turbid.

Of or relating to mud; also, having the characteristics of mud, especially in colour or taste.

(euphemistic) Soiled with feces.

(archaic) Of an animal or plant: growing or living in mud.

Dirty, unclear, morally dubious, and potentially angry or sad.