While my roof was being repaired a "belly" was discovered in the roof & in the ceiling. What the heck is a belly in the roof? I'll tell you ~ about $1000 of extra labor. While my floors were being sanded the sanders (I guess that's what it's called) found that my floor "pickled". What is pickling in a floor ~ it's a stain. Just call it a stain. Why do plumbers use nipples & where the heck do they use them? There are a few more (wish I had kept a list) that I find interesting; more I find the terms to be weird ~ I'd like to know how the terms came to be. None of the construction crew seems to know. Could be they are messing with me. Ya think?