tearjerker
noun [ C ] informal uk/ˈtɪəˌdʒɜː.kər/ us/ˈtɪrˌdʒɝː.kɚ/
催人泪下（或十分伤感）的书（或电影、戏剧等）
a book, film, play, etc. that has a sad story intended to make people cry or be sad
Bring a pile of tissues with you when you see that film - it's a real tearjerker! 我建议看那部电影时你多带些纸巾去——那可真是一部催泪片！