1 informal, chiefly US a contemptible or foul-smelling person or thing.
2 (also stinkpot turtle) an American musk turtle with a domed shell, typically living in muddy-bottomed waters and producing a strong unpleasant smell when disturbed.
Kinosternon odoratum (or Sternotherus odoratus), family Kinosternidae
stinkpot in other Oxford dictionaries
Definition of stinkpot in the US English dictionary