IPA: //ˈpɒpɪnˌdʒeɪ//
KK: /ˈpɑːpɪnˌdʒeɪ/
A person who is overly concerned with their appearance and often talks too much, usually in a way that shows off or tries to impress others.
He acted like a popinjay, always boasting about his looks and achievements.
Popinjay originates from the Middle French 'papegai', meaning parrot, which itself comes from the Latin 'papilio', meaning butterfly. The term evolved to describe a parrot-like figure, often used to refer to a vain or conceited person who is overly concerned with appearance.
Imagine a parrot ('papegai') that mimics and shows off, helping you remember that a 'popinjay' refers to someone who is vain and overly concerned with their looks.
No commonly confused words.