what does floss mean???
Greetings Kelso, floss is a term for a piece of string used for cleaning in between one's teeth. Here is a more thorough definition taken from Wikipedia:
Dental floss is thin nylon filaments or a ePTFE or UHMWPE substrate used to remove food and plaque from teeth. The floss is inserted between the teeth and scraped along the teeth sides, especially close to the gums. Dental floss comes both waxed and unwaxed.