as somebody whose first language is not English, it happens rarely that I need to look at up word in the dictionary. I needed to do that to understand your question, though, because I had never heard the word “bunkness”. In the event that there may be somebody else out there, here is the definition per urban dictionary (shortened to avoid profanity): “something veryyyyy stupid, something you hate/dislike, also something grossss”.
I pulled up the nutrition part of the ACSM manual to find out what may be so stupid and offensive to you but failed to see it. The information there seems the consensus of experts on good nutrition.