by the short hairs

The phrase "by the short hairs" is an idiomatic expression that refers to having someone in a difficult or vulnerable position from which they cannot easily escape or evade. It suggests that a person is firmly held or controlled, often in a situation where they are at a disadvantage and have limited options or flexibility. It implies a sense of being caught or trapped, typically against one's will, and not having the upper hand in a particular circumstance.