I have a lot of stuff in my room.

My nose is stuffed up.

This store sells a lot of hot stuff.

He always handles rough stuff with care.

Despite the myriad of obstacles we had to overcome, we managed to engage in such fun stuff, it makes all the hardship seem inconsequential.

I often talk about random stuff with my friends.

He stuffed down his lunch quickly.

I don't like when people make stuff up just to get attention.

The room feels stuffy because there is no ventilation.

He may come across as a stuffed shirt, but he's actually quite down-to-earth.