expression
open sesame!
A magical phrase from the Ali Baba story, used to command something to open. In Japanese, it is a set expression, often used playfully or in reference to the tale.
「開けゴマ！」と叫ぶと、岩の扉が開いた。
When he shouted "Open sesame!", the stone door opened.
このドアは開けゴマって言っても開かないよ。
This door won't open even if you say "open sesame".
From the Arabic phrase 'iftaḥ yā simsim' (open, O sesame), via the story of Ali Baba and the Forty Thieves. The Japanese form is a direct translation using 開ける (to open) and ゴマ (sesame).