Not Have a Leg to Stand On
Pedagogically reviewed by LexFizz Team
To have no facts or sound reasoning to support your argument or position.
Quick meaning: If you do not have a leg to stand on, you have no evidence or good reasons to support your argument, so your position is weak and unlikely to succeed.
Meaning
To say someone does not have a leg to stand on means their argument, claim, or case is unsupported by facts, evidence, or sound reasoning. Without this support, their position cannot hold up — just as a body cannot stand without legs.
The idiom is especially common in legal, formal, and argumentative contexts. If a person makes a complaint but has no proof, you might say they do not have a leg to stand on. It can apply to a courtroom case, a workplace dispute, or simply a disagreement between friends.
The phrase is almost always used in the negative. It strongly implies that the person is wrong or will lose, because there is nothing solid holding their position up.
Origin
The idiom draws on a simple physical image with legal origins. A person stands upright on their legs; remove the legs, and they collapse. Applied to an argument, the “legs” are the facts and evidence that hold a case up. A case with no supporting evidence has nothing to stand on, so it falls.
The expression has been used since the 17th century, and an earlier version spoke of an argument that “has not a leg to stand on.” It became closely associated with the law, where a claim must be supported by evidence to succeed. Over time it spread to everyday English to describe any weak, unsupported position. Reference works such as the Cambridge Dictionary catalogue thousands of such figurative expressions, showing how idiomatic meanings take shape over time.
The metaphor is vivid because it links the strength of an argument to the stability of a standing body — both need solid support underneath.
Example Sentences
Without a signed contract, the company doesn’t have a leg to stand on in court.
He claimed the car was faulty, but the inspection proved otherwise, so he didn’t have a leg to stand on.
If you can’t produce a receipt, you won’t have a leg to stand on when you ask for a refund.
Dialogue Example
A: They’re threatening to take us to court over the delay.
B: Let them. The contract clearly allowed for extensions, so they don’t have a leg to stand on.
A: That’s a relief — I was worried we’d done something wrong.
Usage Notes
This idiom is semi-formal and used in both British and American English. It nearly always appears in the negative, with forms such as “doesn’t,” “didn’t,” “won’t,” or “hasn’t” have a leg to stand on. The phrase “a leg” stays singular even though a body has two legs.
Common Mistakes
Learners sometimes use the phrase positively, saying “he has a leg to stand on,” which sounds unnatural. It is almost always negative. Also, keep “leg” singular — the standard form is “a leg,” not “legs.” And remember it describes weak arguments, not physical balance.
Related Idioms
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Quick Check: Not Have a Leg to Stand On
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1. What does “Not Have a Leg to Stand On” mean?
Frequently Asked Questions
What does "not have a leg to stand on" mean?
It means to have no facts, evidence, or sound reasoning to support your argument or position, so your case is weak and unlikely to succeed.
How do you use "not have a leg to stand on" in a sentence?
You can say "Without proof, you don’t have a leg to stand on" or "They didn’t have a leg to stand on in court." It is nearly always used in the negative.
Where does "not have a leg to stand on" come from?
It comes from a simple image with legal origins. A body needs legs to stand, and an argument needs evidence to hold up. A case with no supporting evidence has nothing to stand on, so it collapses. The phrase dates from the 17th century.
Is "not have a leg to stand on" always negative?
Almost always. It is used to say an argument lacks support. Using it positively, such as "he has a leg to stand on," sounds unnatural to native speakers.
Is "leg" singular or plural in this idiom?
It is singular: "a leg." Even though a body has two legs, the fixed phrase uses just one. Saying "legs to stand on" is incorrect.
Is "not have a leg to stand on" formal or informal?
It is semi-formal. It is common in legal and professional discussions but also appears in everyday conversation about disagreements and claims.
What is a similar idiom to "not have a leg to stand on"?
"On shaky ground" describes a weak position, and an argument that "doesn’t hold water" also fails to stand up to scrutiny.
Is this idiom used in American English?
Yes. It is common in both British and American English and is widely understood in legal and everyday contexts.
Can this idiom be used outside the law?
Yes. While it is common in legal contexts, it applies to any weak, unsupported argument, such as a workplace dispute or a casual disagreement.
What English level is "not have a leg to stand on" suitable for?
It is suitable for B2 (Upper Intermediate) learners. The idiom is figurative and often used in discussions about evidence, argument, and law.