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lead in one's pencil

A euphemistic slang phrase meaning male sexual arousal or virility — essentially referring to an erection, though it's often used more broadly to imply energy, readiness, or sexual vitality.

ˈlɛd ɪn ˈwʌnz ˈpɛnsəlhistorical189 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

A euphemistic slang phrase meaning male sexual arousal or virility — essentially referring to an erection, though it's often used more broadly to imply energy, readiness, or sexual vitality. It's the kind of double entendre your granddad would wink at while pretending he was talking about stationery. Crude but relatively mild, and still heard in British comedy contexts.

He swore that morning cold showers put lead in one's pencil — not everyone was convinced.
Origin: Plays on the double meaning of 'lead' (the writing material inside a pencil) as a metaphor for male sexual readiness; in use since at least the early 20th century. Editorial expansion authored on Slangora (model-assisted, hedged).
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#2·Apr 27, 2026

(slang) A state of erection of one's penis.

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