Grease monkey is a slang term commonly used to refer to a mechanic or someone who works with machines. However, this term can be seen as derogatory or offensive, which is why many prefer to use synonyms to describe a mechanic. Some synonyms for grease monkey include technician, repairman, mechanic, engineer, serviceman, and auto technician. These synonyms convey the same meaning as grease monkey, but without the negative connotation. By using more professional terminology, we can show respect for those who work in the mechanical industry and acknowledge their expertise and importance. So, next time instead of calling someone a grease monkey, use one of these professional synonyms.