The term trouser leg refers to the extension of a pair of trousers that covers the leg. There are a few different synonyms you can use to refer to the trouser leg. Some people may use the term pant leg or leg of pants. Others may use the phrase trouser cuff to describe the bottom of the pant leg where it meets the shoe. In some cases, you may hear people use the term pantaloons or slacks to refer to the entire pair of trousers. Regardless of your preferred terminology, it's important to choose words that accurately describe the garment you are referring to.