Ok. That’s bad in more than one way, do you exercise anything now? Not that I have anything against fat people but it sounds like you’re not comfortable with it.
What a lig pop actually is is not totally clear as far as I know, some say it’s some part of the pubic bone that actually makes the sound, I don’t really know.
First, I’m not a vet and I don’t know if it’s benificial or even good or bad, so try it at your own risk. But I know that it is a popping sound in the lower regions, it doesn’t hurt or anything. And I achieve it trough strething straight out and putting my second hand behind the one gripping the glans and then pressing down with the carpus of the hand, OR by first strething straight up and then lowering my penis pretty fast. I guess you have to try it out for yourself :)