working stiff ˌworking ˈstiff noun [countable] informal
an ordinary person who works to earn enough money to live:
• Most of the men are ordinary working stiffs, doing their job.
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working stiff UK US noun [C] US INFORMAL
► WORKPLACE someone who does an ordinary job that is often not very well paid: »
Executives at City Hall are earning around three times more than the working stiffs.
Financial and business terms. 2012.