"While your molars rot." What kind of expression is this ? I've never heard of it outside of this site, and I can't find any reference to it anywhere. Can someone explain to me what it means, and where it comes from (etymology). Maybe it's me but it's the kind of expression that makes me want to punch the one that uses it in the face. I think it sounds very unpleasant and frankly its use seems intended to insult. Edit: This is not aimed at anyone.