"Gets dander up" is an idiomatic expression that refers to becoming angry, irritated, or upset, usually as a result of feeling provoked or challenged. The phrase draws its meaning from the term "dander," which historically referred to tiny scales of skin or hair that animals (particularly cats) shed. When someone's dander gets up, it implies that they are becoming riled up or agitated, as if their hackles were raised.
The expression is often used to describe a person's reaction to a statement, action, or situation that offends or angers them. It suggests a heightened emotional state, often accompanied by a defensive or confrontational reaction. The underlying premise is that when one's dander is up, they are more likely to respond with heightened passion, aggression, or frustration.
The phrase is primarily used in informal contexts, conversations, or storytelling rather than in formal or technical settings. It exemplifies the colloquial nature of idiomatic language, which adds color, emphasis, or imagery to everyday speech. Its usage is not limited to any particular region or culture, as it has found its way into the vernacular of English speakers worldwide.
In summary, "gets dander up" means to become angry, irritated, or upset due to a provocation or challenge.
