thumb on the scale
An act of bias or a tactic for cheating which creates a situation that unfairly benefits one party involved in an interaction.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“The judge kept his thumb on the scale to help his friend win.”
“He keeps his thumb on the scale to help his own team win.”
“The company put a thumb on the scale by paying the reviewers to give them a higher rating.”
“The hiring manager put a thumb on the scale by giving her nephew the interview questions before the other candidates arrived.”
“By manipulating the voting data, the corrupt official effectively placed a thumb on the scale to ensure his preferred candidate secured the victory.”
The idiom alludes to the practice of a butcher who surreptitiously applies pressure with a thumb while weighing meat. By adding the weight of the digit to the scale, the merchant increases the calculated price of the sale at the customer's expense. The phrase remains a standard reference to the act of cheating where one party introduces a hidden advantage to influence a supposedly objective measurement.
- 01
all fingers and thumbs
Of a person, clumsy or awkward.
- 02
all thumbs
Clumsy; awkward; not dextrous.
- 03
brown thumb
A lack of skill at growing plants; a poor gardening skill.
- 04
butcher's thumb
A dishonest practice in which a butcher uses their thumb to add extra weight to a scale when weighing meat.
- 05
fash one's thumb
To bother oneself; to worry about something.
- 06
green thumb
A natural skill for gardening.
- 07
off the scale
Far in excess of what is normal or measurable.
- 08
returns to scale
a function describing how returns scale when production increases in the long run
Last updated August 10, 2026