What is "hipster" and "indie"? I really don't get it.?

I know these stupid trends keep coming, like at one time it was cool to be "emo" and then after that came "scene." But what is hipster? The description sounds really ridiculous to me. It's like "oh, you know, when you drink black coffee and listen to the Beatles." Uhmm, doesn't that describe a big portion of the population? My dad drinks black coffee and listens to the Beatles but he doesn't have time for this lame "hipster" **** lol