Definition: Anything that is hollow and cylindrical in shape.

Alright class, settle down, let’s take a look! The dictionary gives you the facts, it’s true, “Hollow and cylindrical,” a shape for you. But "tubes," my dears, has a meaning bright, It's more than just form, shining like light! When we say “tubes” in slang, don't be misled, It means tired or exhausted , it’s often said. Like when you’re feeling worn and slow, You might say you're "in tubes," you know! Think of a tire, round and deep, Where a driver rests, needing sleep. That's the feeling we're trying to convey – A state of tiredness, day by day! So remember this lesson, clear and concise, "Tubes" can be shape, or a feeling nice... Or maybe just a little bit worn down, Let’s give our brains a thoughtful frown! 😊 Do you have any questions about this, class?