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Yomi
しゃかいのまど
Rōmaji
Shakai no mado
Type
slang
Literal Meaning
a window of the society
Meaning
a trouser fly
Synonym
ファスナー, チャック
Additional Info
It is said that this word originates from the old Japanese radio show (1948-1960) titled “インフォメーションアワー・社会の窓“. This show mainly talked about hidden aspects/issues of Japanese society, and the word 社会の窓 started to be used humorously to let someone know that their fly is open and their hidden thing is at risk of being exposed to society.
Example
社会の窓が開(あ)いてますよ
Your trouser fly is open.