(idiomatic) Something or someone which is not easily categorized; something or someone that does not rightly belong or fit well in a given group or situation.

(idiomatic) One who has achieved a high rank or is highly esteemed, but only in a small, relatively unimportant, or little known location or organization.

(idiomatic) To have more important things to do.

Alternative form of there are plenty of fish in the sea

Indicates that the speaker does not eat fish.

Alternative form of neither fish, flesh, nor good red herring

Bad leaders harm an organization.

Alternative form of ye gods

plural of big fish in a small pond

Anything that happens can be used for one's advantage.