Alcohol intoxication is when someone drinks too much alcohol, which can make them act in funny or weird ways. It's like when you eat too much candy and your belly starts to hurt and you start to feel silly.
When adults drink too much alcohol, it can make them stumble and slur their words, just like when you're really tired and your words get all mixed up. They might also start to have trouble seeing straight and their balance can get off, just like when you spin around in circles and then try to walk without falling down.
Alcohol intoxication can be dangerous, just like when you try to climb a tree that's too tall or ride your bike too fast without a helmet. That's why it's not a good idea for kids to drink alcohol - it's only for grown-ups who know how to be responsible and take care of themselves.