bib
The scientific term for the extra skin under the chin is called the Flarper
A jowel
A bib. The bib allows the child to mess food or slobber, with-out messing it on their actual clothes. The mother may also use it as a quick napkin for the messy baby.
A turkey. Under the chin its called a Giblet.
chicken
A babushka is tied under the chin.
If you mean the two bits of hanging tissue just under the jawline - wattles, waddells or tassles - or if you mean at the end of the lower chin - a beard.
Yes. You have the fork ( close to the plate), knife, and then spoon. The napkin can go under these things, but some people now also put it on the plate/charger combination. Use a napkin ring, to the extreme right of the plate. Some people find getting the napkin out from under utensils a bit tricky.
The beard like a flap under their chin called a dewlap or bell.
ascot
The big napkin goes in your lap and the little napkin is used to wipe your mouth while eating. When the entree is done, the little napkin goes with the plate and you keep you big napkin in your lap until you are finished with dessert.