Idioms don’t always mean what the words say. Look for the clues and crack the code. Most of them here are B1 level.

🕵️ Case Study #1

When Maya finally received her meal, she had been waiting for almost an hour. The restaurant manager apologized and offered her a free dessert on the house.

What does on the house mean?

A. Served in someone’s home
B. Provided free of charge
C. Made by the restaurant owner
D. Available only to house guests

🔓 Crack the Code

✅ B — on the house = provided free of charge

🕵️ Case Study #2

The comedian told a hilarious story about his first day at work. The audience laughed loudly and applauded for several minutes. His performance really brought the house down.

Meaning?

A. Make an audience react with great enthusiasm
B. Cause a building to collapse
C. Stop a performance suddenly
D. Make the audience leave early

🔓 Crack the Code

✅ A — bring the house down = make an audience laugh, cheer, or applaud enthusiastically

🕵️ Case Study #3

The school organized a concert to raise money for new computers. Every seat in the theatre was occupied, and several people had to stand at the back. The concert attracted a full house.

Can you explain?

A. A house with many rooms
B. A performance with every seat occupied
C. A concert held at someone’s home
D. A performance that lasts all evening

🔓 Crack the Code

✅ B — a full house = a performance or event with every seat occupied

🕵️ Case Study #4

Leo invited his three teenage nephews to stay for the weekend. By Sunday morning, they had eaten all the bread, fruit, cereal, and snacks in the kitchen. Leo joked that they had eaten him out of house and home.

This would be…

A. Eat a very large amount of someone’s food
B. Cook every meal in someone’s house
C. Refuse to eat food prepared at home
D. Move into someone’s house permanently

🔓 Crack the Code

✅ A — eat someone out of house and home = eat a very large amount of someone’s food

🕵️ Case Study #5

Nina was worried about leaving her bicycle outside the community center. Her friend told her not to worry because the area was well monitored and as safe as houses.

What does as safe as houses mean?

A. Very quiet and expensive
B. Completely safe or reliable
C. Located close to many houses
D. Protected by a private security company

🔓 Crack the Code

✅ B — as safe as houses = completely safe or reliable

🔬 Code Spot Check

1. on the house → provided free of charge
2. bring the house down → make an audience laugh, cheer, or applaud enthusiastically
3. a full house → a performance or event where every seat is occupied
4. eat someone out of house and home → eat so much of someone’s food that very little is left
5. as safe as houses → completely safe or reliable

🧩 Coding Master Challenge

You’ve cracked the codes. Now it’s your turn to code the message.

Rewrite each idea using one of the idioms you’ve investigated.

Choose from the list below:

a full house • brought the house down • ate me out of house and home • as safe as houses • on the house

1. The children were playing in a well-protected garden, so their parents knew they were completely safe.

Code it:
The children were __________________.

📢 Reveal the code

✅ as safe as houses

2. The concert was completely sold out, and every seat in the theatre was occupied.

Code it:
The singer performed to __________________.

📢 Reveal the code

✅ a full house

3. The restaurant gave us free drinks because we had waited so long.

Code it:
The restaurant gave us free drinks ______________.

📢 Reveal the code

✅ on the house

4. The comedian made the audience laugh and applaud throughout the show.

Code it:
The comedian really __________________.

📢 Reveal the code

✅ brought the house down

5. My teenage nephews ate nearly all the food in my kitchen during their visit.

Code it:
My nephews __________________.

📢 Reveal the code

✅ ate me out of house and home