switchblade

/ˈswɪt͡ʃˌbleɪd/

switchblade means A folding knife with a blade which opens automatically (under spring pressure) when a button is pressed. Lexicurio rates it Rare gem — a strength score of 77 out of 100.

switchblade is pronounced /ˈswɪt͡ʃˌbleɪd/.

Etymology

From switch + blade.

noun

A folding knife with a blade which opens automatically (under spring pressure) when a button is pressed.

verb

To attack or cut with a switchblade.“I got terrible hangovers from the cheap booze; and, one night, I almost got switchbladed when I put my arm around the wrong "lady of the night.”
To spring open or up.“Switchblading open their silvery cell phones, they call their mortgage brokers and say “Buy.””
To (cause to) make a sudden move or transition.“He briefly rocked medical school, switchbladed to accounting and finally joked his first radio script in 1938.”