to show a leg
- idiom
- Archaic
- The kids were hiding in the bushes, but they couldn’t resist the urge to show a leg and peek out.
Examples
-
After being shy at the party, she finally decided to show a leg and join the dance floor.
-
Show a leg, sailor!
-
He was hesitant at first, but his friends encouraged him to show a leg and take part in the fun.
Antonyms
How Visible
Surface Forms
Morphology
show + a + leg
A B1 learner who knows 'show' and 'leg' would most likely interpret this literally as revealing a body part; the idiomatic sense 'make an appearance/participate' is not a predictable extension of those constituents. The expression is idiomatic and context- or dialect-dependent, with no obvious cross-linguistic compositional logic, so its meaning cannot be reliably derived from the parts.
Etymology
Show a leg may come from life on old ships, where officers would call for sailors to lift a leg from their bed so the officer could see who was awake. So the phrase now means 'to make an appearance' or 'to join in'.