Dictionary / Vocabulary / 胸が悪くなる
むねがわるくなる
to feel sick; to be nauseated
Also written 胸がわるくなる
彼の食べ方といったら、胸が悪くなるね。
Speaking of his eating habits, they're revolting aren't they?
魚の臭いを嗅ぐと胸が悪くなる。
The smell of raw fish nauseates me.