Trim down Definition 1 of 2Pro Tip 1/3Gradual Process Used when talking about slowly decreasing something, often personal goals like weight. I'm going to trim down my sugar intake over time. Pro Tip 2/3Self Improvement It's often associated with positive change, like health or financial habits. He managed to trim down his spending habits. Pro Tip 3/3Specific Focus Typically refers to a targeted area, such as a particular type of cost or body fat. The company is looking to trim down its marketing budget.