noun, na-adjective
bad reputation; unpopularity; poor reception
Used for a person, product, policy, or work that is not well received or has a negative public image. Often appears with 〜だ, 〜の, or 〜になる.
その新製品は不評判だった。
The new product had a bad reputation.
彼の態度が不評判を招いた。
His attitude caused unpopularity.
評判 means reputation or fame (neutral/positive), while 不評判 specifically means bad reputation.
Compound of 不 (negative prefix) and 評判 (reputation, fame).