① A fish out of water someone who is uncomfortable in a specific situation
I felt like a fish out of water at my new school.
② fish or cut bait either commit to what you&`&re doing, or give it up entirely.
Steve has been dating Jane almost six years, and his parents think it&`&s time for him to fish or cut bait.
③ like shooting fish in a barrel
Very easy; much too easy
Playing this game is easy! It&`&s like shooting fish in a barrel[ ˈbærəl ]!
④ off the hook very good, excellent;
That song is off the hook!
⑤ Open a can of worms to create a situation that will cause trouble or be unpleasant
I asked her about her boyfriend, which really opened a can of worms because it turned out that they had just broken up.