가슴이 답답해요 · 가슴이 답답했어요
to feel frustrated and stifled; to have a tight chest (lit. the chest feels stuffy)
Example
아무리 설명해도 이해를 못 하니까 가슴이 답답해요.
No matter how much I explain, they don't get it, and it's so frustrating.
Word parts
답답하다 is the closed-in feeling of a stuffy room: worry or frustration seems to block the chest.
Good to know
Pronounced [가스미 답따파다]. Also a physical symptom: tell a doctor 가슴이 답답해요 for chest tightness.