I've lived in my house for 5 years and I have never emptied a garbage can. It's in the laundry room filled with lint and dryer sheets. It's overflowing by a foot at least.
Why did you never empty it?
My mom said it's not important and I'm too lazy to do anything about it.
It's not something you should be proud of. You're letting the garbage can overflow and that is not only very dirty but it could be hazardous to your own health.
But it's not like the can stinks, it's not full of nasty gunk, not like anyone cares.
It's still dirty and it would be easy to get rid of it. It would be embarrassing if you invited someone over and they saw the state it's in.