an idea that is based on feeling and for which there is no proof

[ + that ] I had a hunch that you'd be here. 直觉告诉我你会来这儿。

Sometimes you have to be prepared to act on/follow a hunch. 有时候你得准备好按直觉行事。

to lean forward with your shoulders raised or to bend your back and shoulders into a rounded shape

We hunched round the fire to keep warm. 我们弓着身子围在火边取暖。

Stand up straight and don't hunch your back. 站直了，别弯着腰。