oh Morello, you are lucky! If you don't know what they are you almost certainly haven't got them! I just ignore mine now except when I bump into them by mistake!
I can't believe this term is actually known widely ! One of my colleagues uses this expression and I thought it was just a random made up thing!! Anyway, you need to tone the muscle, get some free weights if you don't want to join a gym (not really heavy ones as you don't want to bulk up on muscle) and do lots of repitions. Hope that helps.x