Stuff means many things that we have but do not name exactly. We use it to talk about things in a general way.
I packed my stuff for school.
She put her stuff in the bag.
As a verb, stuff means to put things tightly into a small space until it is full. People often use it with bags or food.
She stuffed the bag with clothes.
They stuffed food into their mouths.
This meaning means eating a lot or very fast. It is used in casual talk.
He stuffed his face with pizza.
The kids stuffed themselves at lunch.
Stuff is often used to talk about things we carry or own, like bags, books, or clothes. It's informal and common in daily speech.
Take your stuff and come here.
I left my stuff at home.
To stuff means to push or put things quickly and fully into a space. It often shows a quick or careless action.
He stuffed the papers in his pocket.
She stuffed clothes into the drawer.
Stuff can be used when you don’t want to say exactly what the things are. It is a way to be general or vague.
Do your stuff before you leave.
I can't find my stuff today.