'Draw a snake and add legs' is a classic Chinese idiom describing the act of ruining something good by adding unnecessary, excessive, or inappropriate elements. Literally, it combines four characters: 画 (to draw), 蛇 (snake), 添 (to add), and 足 (leg/foot). Since snakes have no legs, adding them is not only illogical but also spoils the integrity of the original image — symbolizing overcomplication in speech, writing, design, or action.

This idiom is widely used in both formal and informal contexts to criticize redundancy — for example, when someone inserts irrelevant details into a report, over-embellishes a story, or adds superfluous features to a product. It carries a mildly critical or humorous tone and often appears in advice about clarity, concision, and functional simplicity. Though rooted in an ancient fable from the Warring States period, it remains highly current in modern Chinese discourse on communication and aesthetics.