louse
🇺🇸
/laʊs/
🇬🇧
/laʊs/
A tiny bug that lives on people's or animals' hair and can cause itchiness.
The school nurse checked the children for lice after a case of head lice was discovered.
A person who is very unpleasant or untrustworthy.
After he lied to his friends, everyone called him a louse.