Kreets are crusty sheets that are full of debris, such as: toe and fingernail clippings, dead skin from psoriasis, as well as bacon crumbs and other delicious food items.
The kreets were so foul they almost crawled off of the bed.
Everywhere Mark goes he seems to leave a trail of kreets behind.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).