Definitions

1. noun

A type of wild or cultivated rose (Rubus idaeus) that is often used as a food source or to make jam.

“The forager picked cankerberries for her homemade jam recipe.”

2. noun

A metaphorical or figurative canker or sore, especially one that is festering or corrupting.

“The corrupt politician’s actions were a cankerberry in the city’s otherwise functioning government.”