It means the same thing as immature, just this way of saying/spelling it is so much better. Hey, it makes sense doesn't it? Yes. It definitely does.
49👍 46👎
When Graeme Carry's on and thinks he's funny
Graeme your so unmature when u talk shit and tell your dumb dad jokes
3👍 2👎
Unmature: Consistently insulting someone daily for no good reason. And getting mad at someone for nothing.
I made this up