Expressions (phrases, clauses, etc.), Godan verb with 'u' ending
to be frowned on; to invite frowns of disapproval; to displease (people); to disgust
Idiomatic expression
半角カタカナをインターネット上の色んな所で使えば、いつか顰蹙をかいまくる事になるよ。If you go around the Internet, using half-width katakana in various places, eventually you're going to end up pissing off a lot of people.
Also written ひんしゅくを買う【ひんしゅくをかう】