The story
- Middle Englishcopy
- Englishcopy
- Proto-Germanic*kattuz
- Proto-West Germanic*kattu
- Old Englishcatt
- Middle Englishcat
- Englishcat
- English todaycopycat
Originally American English, from copy + cat (“a former derogatory term for a person”).
First known use, by meaning
- from late 19th c. One who imitates or plagiarizes the work of others.
- from early 20th c. To act as a copycat; to copy in a shameless or derivative way.
Etymology from Wiktionary, CC BY-SA 4.0.