"Yo"

Today I went to the Sports Bar mentioned in the post where I expressed my concern about the current Youth of America. While the crowd there today was present for the same reason as I(NFL Sunday Ticket) and less rambunctious than last time, I did learn a tidbit about today's youth language.
I was sitting at the bar next to two individuals in their mid twenties (or so they seemed). They were rooting for the team playing against the Tennessee Titans so I didn't say much to them, but had our teams been mutual I would not have known how to communicate. I did not start keeping track until about fifteen minutes before I left, but in that time period of listening to their conversation, I heard the word "Yo" at least thirty times. I had decided to keep track after hearing it in about every aforementioned sentence in their previous conversations. I have used the word myself, but it is typically just to get someone's attention and not to fill space in a sentence where no word is really needed. For instance, instead of saying: "This coming Friday will be a great time to get a good price on an HD TV," it is common to say something to the effect of : " "Yo, those TVs are dropping in price,yo. So yo, you know what I mean, it might be good to get one this Friday. Those prices, yo, they be going down." Upon hearing many sentences following this example, and the Titans not really making good progress in their game, I decided to leave the bar...yo.