Antonyms for the phrase "delivers the goods" include disappointing, failing, underdelivering, falling short, and missing the mark. When someone fails to deliver the goods, they are essentially letting down or not meeting expectations. Disappointing or underdelivering can be especially frustrating for individuals or businesses that were counting on a service or product to meet their needs. Falling short or missing the mark can be viewed as a lack of effort or preparation, which can damage relationships and reputations. Ultimately, it is important to prioritize communication and transparency to avoid misunderstandings and setbacks when it comes to delivering the goods.