i-adjective
grotesque but cute; creepy-cute
Describes something that is simultaneously disturbing or grotesque and cute, often used in subcultures like horror-themed kawaii fashion or art.
このグロ可愛いキャラクターが人気だ。
This grotesque-but-cute character is popular.
彼女のグロ可愛いアクセサリーはいつも注目を集める。
Her creepy-cute accessories always attract attention.
キモ可愛い means 'gross but cute' and focuses more on disgust or creepiness, while グロ可愛い emphasizes grotesque or horror elements.
Compound of グロ (from English 'grotesque') and 可愛い (cute). The exact origin is uncertain, but it likely emerged in Japanese internet and subculture slang.