Final answer:
The phrase 'We've got bigger fish to fry' is an example of an idiom, which means there are more important or pressing matters to attend to.
Step-by-step explanation:
The phrase 'We've got bigger fish to fry' is an example of an idiom, which is a type of figurative language. Idioms are expressions that have a figurative meaning different from their literal meaning. This particular idiom means that there are more important or pressing matters to attend to. It is not meant to be taken literally, as it does not involve actual fish or frying.