muka-muka
That awful churning in your stomach when you feel like you might throw up. Also used for feeling irritated or disgusted.
💡After eating too much greasy food — 'My stomach feels muka-muka after that fried food.'
食べすぎて胃がむかむかする。
I ate too much and my stomach feels muka-muka.
The car ride made my stomach feel ___ and nauseous.
車酔いで胃が○○する。