it means to stay in one particular area, not doing anything in particular. Often, you "hang around" with your friends.
"Hanging out" means to be seen at a particular place or venue (eg a cafe or bar) or with a particular group of people. Or just talking with friends on the phone.
It is just an exaggerated way of saying something happens quite often - it is hyperbole, not an idiom.
just means he happens to be there
It refers to a day being noteworthy or of hanging a banner of announcement, usually of good news.
"A penny" isn't an idiom - it's just a one-cent American coin.
NO Hanging out, or standing around
It's not an idiom. It means just what it says - every generation in the future.
Your just flopping around and are getting nowhere. Like a swimmer who begins to cramp you can see he isent swimming right he is floundering. Your loosing it..
It's not really an idiom. It means just what it sounds like -- whatever happened just proves what you were saying all along.
Just hanging
It means that is is just the best of the best! :D
Just a flowery word for day.