Informal term for mechanics especially those who work on cars or aircraft?

The term "grease monkey" is an informal term used to refer to mechanics, particularly those who work on cars or aircraft. The term is often used in a derogatory manner, implying that the mechanic is dirty or of a lower social status. However, the term can also be used in a more lighthearted or affectionate manner.

The origin of the term is unclear, but it is thought to have originated in the early 1900s, when mechanics were often required to work in dirty conditions, and as a result, were often covered in grease. The term may also have been used as a way to distinguish between skilled mechanics and those who were less experienced or qualified.

Today, the term "grease monkey" is still used in some circles, although it is generally considered to be outdated and derogatory. Mechanics should be treated with the same respect as any other profession, and it is important to avoid using derogatory terms when referring to them.