Under the hammer is a phrase that means to be sold at an auction. While this is a common phrase, it's always good to have synonyms to enhance your vocabulary. Alternatives to under the hammer include sold under the gavel, auctioned, put up for bid, or going once, going twice, sold. Another way to say something is selling at an auction is to say it is on the block. If something is being sold quickly and for a low price, you might describe it as being a fire sale, or sold at a liquidation. No matter how you describe it, buying something under the hammer can be an exciting experience.