What does it mean to be "stoned" and what's it like?

1. What does ‘stoned’ mean?

Does it mean you’re high from smoking marijuana?

Or could it mean some other types of drugs like, say, cocaine, crack, heroin, ecstasy?

2. What’s it like when you’re stoned?

I always understood it made you feel kind of chill but recently I heard someone say it made them crazy?

Is that normal?

Or does everyone have a different experience of being ‘stoned’?