squeamish

This term describes a visceral, physical reaction of disgust rather than a moral or intellectual objection. It evokes the image of someone recoiling or turning their head away to avoid nausea or a fainting spell, often associated with a lack of fortitude in the face of biological messiness.

In a social or ethical sense, it can describe a person who is overly fastidious or hesitant to engage with something they perceive as "dirty" or improper. This usage suggests a certain delicacy or fragility of character, often implying that the person is too refined or timid for a particular gritty reality.