In Florida, it snows only 'once in a blue moon'. What does 'once in a blue moon' mean?

Nathan said he could hit a baseball over the tall fence in his yard. Paul said, “No way can you do that!” Nathan replied, “Yes I can. It’s a piece of cake!” What does “piece of cake” mean?

Poor Serena got the flu and was sick in bed for four days. Finally, she was back at school. Her teacher welcomed her back and said, “How are you doing?” Serena smiled and said, “I’m in the pink now!” What does ‘in the pink’ mean?

Ruben said he thinks he will win the million dollar prize. His friend laughed and said, "Sure, 'when pigs fly," What does "when pigs fly" mean?

Marco worked hard all week. He left his home early every morning and did not come home until night. On Friday, his friend asked if he wanted to go to the movies. Marco said, “No thanks, I’m wiped out.” What does “wiped out mean

Hunter’s room had clothes all over the floor, his desk had piles of books and papers, and there was dust and empty bags of chips everywhere. His mom opened the door and said, “What a train wreck!” What does ‘what a train wreck’ mean?

Nick didn’t study for his spelling test and got a poor grade. His teacher said, “Next time, you better put your nose to the grindstone”. What does “put your nose to the grindstone” mean?

Annie was getting into a lot of trouble for not doing her homework, and not studying for tests. Her teacher said, “You need to work harder, you are skating on thin ice. Report card time is coming.” What does “skating on thin ice” mean?

Keith could not go to the game because he was feeling "under the weather" What does 'under the weather' mean?

Tonight is pizza night at Nicole’s house. Nicole says, “Oh, good, I can’t wait for the pizza guy. I am going to pig out!” What does ‘pig out’ mean?

Jessica told her friend Becky, “Hey, hurry and go outside, someone is dropping dollar bills on the sidewalk!” Becky ran outside but found no dollar bills. When she came in Jessica laughed and said, “I was just pulling your leg”. What

Jose was chasing his dog around the living room. He bumped into a table and knocked over a glass vase, breaking it. His sister heard the sound, and told him, “You are in hot water now!” What does “in hot water” mean?

Kayla was planning a surprise birthday party for her mom. She told her brother Andrew, “Don’t let the cat out of the bag”. What does “Don’t let the cat out of the bag” mean?