What does it mean when someone says they are 'as snug as a bug in a rug'?

It means they are super cozy or comfortable.

Which of these situations best describes the idiom 'letting the cat out of the bag'?

Telling your friend about their surprise birthday party before the party happens.

Name: What Are Idioms?
Author: Insta~Lesson

2nd Grade · ELA · 20 min

I can explain the meaning of common idioms.

1
The idiom "letting the cat out of the bag" means revealing a secret by accident.
2
If someone is described as a "couch potato", this means they are lazy and watch too much TV.
3
To "have butterflies in your stomach" means to feel nervous.

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