In episode 2334 of the All Ears English podcast, the hosts tackle a listener's question about idioms related to self-deprecating humor, particularly those that suggest a lack of intelligence. They discuss phrases like "not the brightest crayon in the box" and "not the sharpest tool in the shed," examining how these expressions can be used and how they might offend. The hosts highlight that when used playfully among close friends, these idioms can strengthen bonds, but they can come off as hurtful if directed at someone unfamiliar. The episode wraps up with a role-play that illustrates the right way to use these phrases in a friendly context.