What is the origin of the idiom "dumb bunny" and when to use it?

The exact origin of the idiom "dumb bunny" is unclear and not definitively documented. However, it likely emerged from a combination of two elements: the term "dumb" meaning lacking intelligence, and the word "bunny" as a colloquial term for a rabbit, which is often associated with innocence or naivety. The idiom may have originated as a playful way to describe someone who is perceived as foolish or gullible, similar to the image of a bunny being seen as cute but not particularly smart. Over time, it has become a commonly used phrase in informal language to gently mock or tease someone's intelligence in a lighthearted manner.