This refers to a Halloween ensemble that humorously mimics the appearance of a startled deer caught in the glare of vehicle headlights. The costume typically includes deer-like attire, such as brown clothing, ears, and possibly a tail, combined with an element representing headlights, often achieved with wide-eyed makeup or strategically placed light sources.
The appeal of this kind of getup lies in its novelty and comedic nature. It often serves as a conversation starter at Halloween events due to its recognizable and inherently funny concept. While not deeply rooted in historical traditions, its emergence reflects a modern interest in lighthearted and pop-culture-referencing costumes.