Not good at something; weak in a skill or subject (to be poor at).
私は数学が苦手で、テストの点数がいつも低い。
I'm poor at math and my test scores are always low.
彼は人前で話すのが苦手だが、文章を書くのは得意だ。
He's bad at speaking in front of people, but he's good at writing.
辛い食べ物は苦手なので、あまり食べない。
I'm not good with spicy food, so I don't eat it much.
Not one's cup of tea; something one doesn't particularly like or prefer.
コーヒーは苦手で、紅茶の方が好きだ。
I'm not a fan of coffee; I prefer tea.
彼女はホラー映画が苦手だから一緒に見たがらない。
She doesn't like horror movies, so she doesn't want to watch them together.
人混みが苦手な人は休日に図書館に行くことが多い。
People who dislike crowds often go to the library on holidays.