Waterways
- Big Muddy Creek:
- Big Muddy Creek (Missouri River), a tributary of the Missouri River in Saskatchewan and Montana, or
- Big Muddy Creek (New Zealand), a stream flowing into the Manukau Harbour in New Zealand
- The Missouri River, which is nicknamed "Big Muddy" due to its high silt content
- The Big Muddy River, a 166 mile long river in Illinois, USA
Read more about this topic: Big Muddy