a good fish - A good fish is when someone says your friend is so attractiv

A good fish is when someone says your friend is so attractive they think you should marry him and maybe get a divorce later.

I called my friend Ryan a good fish and told him he was going to be my brother-in-law someday.

My roommate called his friend a good fish and then tried to set him up with my sister.

I told my cousin he was a good fish and then he proposed to my friend.