A phrase used when theconversation has died. The goal is to start up a new conversation, either about the Lakers, or simply because it often comes off as a completely random phrase to the other person.
"Hey, hows it going?"
"Good you?"
"Good"
"yeah..."
"..."
"SO! How bout' them Lakers?"
"What are you talking about, loser?"
When used in conjunction with a sports team (i.e. How bout dem Raiders?), it is often used to break a moment of awkwardness in a conversation, usually quite obviously.
Person A - I've been growing a large and fairly disgusting rash near my rectum... I really don't know what is causing it.
Person B - ... So, how bout dem Raiders?