A word invented by the character Murky in the childrens' book series "Origami Yoda" for things that are so bad that there is no word in the English language that could describe how fucking god-awful something is.
Extra s's can be added to describe things that are even more nostrul: NOSSSSSSSSSTRUL
Example A: Dammit, there was something up with that milk. It was even worse than you could ever expect spoiled milk to be. In fact, it may be on the verge of NOSTRUL-ness.
Example B: There's something that smells nosssssssssstrul out there, like, worse than if 42069 skunks sprayed at the same time, shat a mountain, and coated the air in a dense layer of sulfur particles.
The act of taking a man's full load of cum by a female(or male) up a single(or both) nostril(s) & snorting it.
"Jesus, was that high priced hooker was worth every penny we spent for your bachelor party last night, Rich! Did you see the way she could take a load of nostril snotch in one single snort! Wow, whatta professional she was!"