Stink is a smell that is really, really strong and not very pleasant. It can come from lots of different things like old food, sweaty socks, or even your brother's stinky feet! Sometimes stink can make you feel sick or give you a headache, so it's important to try and get rid of it. You can do this by washing things properly, throwing away old or smelly things, and keeping things clean and fresh. It's also a good idea to avoid things that you know make stink, like wearing the same socks for too long or leaving food out for too many days. Remember, stink might seem funny or interesting at first, but it's always better to stay clean and fresh so everyone can enjoy being around you!