1(1) A feeling of nausea; queasiness in the stomach. (2) A feeling of irritation or anger — being upset or annoyed.
脂っこいものを食べて胸がむかつき始めた。
After eating greasy food, I started to feel nauseous.
彼の無責任な態度にむかつきを覚えた。
I felt irritated by his irresponsible attitude.
満員電車で押されて、むかつきが治らない。
Being pushed in the crowded train left me irritable and I can't calm down.
薬を飲んだらむかつきが少しおさまった。
After taking medicine, the nausea eased a bit.