oily rag

Definitions

Slang

  • noun a disparaging term applied to inexperienced or incompetent motor mechanics who are assigned menial jobs such as wiping away grease
  • noun a cigarette. This piece of rhyming slang, from fag, was common in the 1950s but is now rarely heard.
http://www.dictionarycentral.com/definition/oily-rag.html