blue-collar
1. [ adjective ] of or designating work or workers in occupations not requiring well-groomed appearance
Related terms: white-collar industrial wage-earning manual unskilled
2. [ adjective ] of those who work for wages especially manual or industrial laborers
Synonyms: working-class wage-earning propertyless
Examples:

"party of the propertyless proletariat"- G.B.Shaw

Related terms: lower-class