Sentence examples for my belt from inspiring English sources

The phrase "my belt" is a correct and usable phrase in written English.
You can use it to refer to the actual belt that you are wearing, or it can be used figuratively, such as in the expression "buckle my belt", which means to be prepared for a challenge. For example, you could say: "I was getting nervous for the exam, but I buckled my belt and was ready to go."