switchblade
noun🔊/ˈswɪtʃbleɪd/
🔊/ˈswɪtʃbleɪd/
(especially North American English) (British English also flick knife)
a knife with a blade (= sharp metal cutting part) inside the handle that jumps out quickly when a button is pressed 弹簧刀 Owning or carrying a switchblade is illegal in the United Kingdom. 在英国，持有或携带弹簧刀是违法的。