copycat
US /ˈkɑː.pi.kæt/
UK /ˈkɑː.pi.kæt/

1.
模仿者, 抄襲者
a person who copies another's behavior, dress, or ideas
:
•
She's such a copycat, always wearing what I wear.
她真是個模仿者,總是穿我穿的衣服。
•
The police suspect a copycat in the recent string of crimes.
警方懷疑最近一系列犯罪中存在模仿犯。