louses
lou-ses
noun
Small, wingless parasitic insects living on the skin or hair of animals or humans.
"The farmer checked his sheep for louses."
verb
To completely spoil or ruin something, often through incompetence or clumsiness.
"He always louses up important tasks."
Thesaurus
Synonyms: insect, dirt ball, worm, louse, sucking louse, plant louse, biting louse, bird louse