nastiness

noun

1.
a state characterized by foul or disgusting dirt and refuse
filth filthiness foulness
Derived from:
nasty
2.
malevolence by virtue of being malicious or spiteful or nasty
bitchiness cattiness spite spitefulness
Derived from:
nasty
3.
the quality of being highly unpleasant
Antonym:
niceness
Derived from:
nasty