The New "Hello"

I was at work today and a fellow employee walked by me. One of his hands was in his pants, (no, that's not a typo - it really was in his pants, not his pocket, but his pants.) the other slowly rose from his side. He held out two fingers in a peace sign and bobbed his head once. I believe this was some form of greeting, but one cannot be sure. I offered a polite smile and he seemed pleased.