dirt ball vs louse

dirt ball and louse both are nouns.

Word	Noun	Adjective	Verb	Adverb
dirt ball	Yes	No	No	No
louse	Yes	No	No	No

As nouns, dirt ball and louse are synonyms defined as:

dirt ball and louse: a person who has a nasty or unethical character undeserving of respect

Other synonyms of dirt ball include insect, worm.

dirt ball (noun)	louse (noun)
a person who has a nasty or unethical character undeserving of respect	wingless usually flattened bloodsucking insect parasitic on warm-blooded animals
	any of several small insects especially aphids that feed by sucking the juices from plants
	wingless insect with mouth parts adapted for biting; mostly parasitic on birds
	a person who has a nasty or unethical character undeserving of respect