khí-ke起雞

to pull the firing pin of an old-style gunpowder

to pull the firing pin of an old-style gunpowder gun (preparing to fire); to have an erect penis

English Wiktionary, “起雞” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%B5%B7%E9%9B%9E · confidence: Medium (Wiktionary)