Complex sentence: A gofer or go-fer is (primarily in English within North America) an employee who is often sent on errands; dogsbody is a similar British term, and dog robber an American military one.
Split into simpler sentences: A gofer or go-fer is a term used to describe an employee who is often sent on errands. The term originated in North America, with the phrase "dogsbody" being a similar British term, and "dog robber" an American military one.