Smasher/ˈsmæʃər/ Definition 1 of 3Pro Tip 1/3Positive Impression Use when you're really impressed with something and want to emphasize its awesomeness. The chef's special dessert was a smasher! Pro Tip 2/3Celebratory Context Often used to describe someone's achievement or success, like hitting a milestone. Her graduation party was an absolute smasher! Pro Tip 3/3Informal Usage It's casual language, so it's best for conversations among friends, not in a professional setting. Did you see that dress? What a smasher!