Definitions

1. noun

a person who constantly finds fault or criticizes others, often in a petty or annoying way

“Her husband was a nagger, always finding fault in her cooking.”

2. verb

to nag or constantly find fault with someone

“He has been nagging his daughter about her grades for weeks.”

3. adjective

tending to nag or constantly find fault with others

“Her nagging nature made it difficult to live with her.”