Here are some possibilities:
* A nickname: Someone might call their poodle a "swamp poodle" if it loves to play in water or if it has a muddy appearance after being outside.
* A breed mix: It's possible that someone created the term "swamp poodle" to describe a poodle mix that has certain characteristics, like a water-loving personality or a more rustic appearance.
* A made-up term: It could be a playful term used by a group of friends or a family.
To clarify what "swamp poodle" refers to, you would need more context. For example, did you hear this term from a specific person or group? What was the context in which it was used?
Without more information, it's impossible to definitively say what "swamp poodle" means.