louse: Meaning and Definition of

louse

1. any small, wingless insect of the order Anopluraparasitic on humans and other mammals and having mouthparts adapted for sucking, as Pediculus humanusand Phthirius pubisor
2. any insect of the order Mallophagaparasitic on birds and mammals, having mouthparts adapted for biting.
3. See
4. a contemptible person, esp. an unethical one.

1. to delouse.
2. to spoil; botch: Miscasting loused up the movie.