Pooticulate matter is the term for
microscopic particles of poo. When you smell a fart, it is because these poo particles have traveled through the air and attached to your nose hairs. This pooticulate matter to nose hair contact is what alerts you to the fact that someone has farted in your vicinity. This is commonly known as the "air-past-poo" fart that is much more aggressive and offensive than it's
silent but deadly cousin. Even more
disturbing, Pooticulate Matter has been known to cause pink eye if unleashed, unfiltered, on a pillow.