Complete sentence? Didn't know this was an english class. The article to look up on you tube was "I'm a chief" but has been changed to "like a chief". Its a spoof on lonely planets "like a boss/ I'm the boss", but about navy chiefs, apparently done up by some sub guys. There is a little bit of swearing, but it only add to the humor. And yes it is a rap based song.
Well, it didn't have to be copmplete, but it would have been nice if it would have not been fragmented and broken. It made no sense. BTW, you came into the mess, so really, if we want to correct your grammar we will. Either that, or don't come in.