社しゃ会かいの窓まど

しゃ

か

い

の

ま

ど

Meanings

1

expression, noun

fly (on trousers); flies; zipper

jocular, humorouseuph

Jocular euphemism for the fly of trousers, literally 'window to society'. Used humorously to point out an open fly.

おい、社しゃ会かいの窓まどが開あいてるぞ。
Hey, your fly is open.

社company, firm, office
会meeting, meet, party
窓window, pane

Similar words

チャック
チャック is a common casual term for zipper, while 社会の窓 is a jocular euphemism specifically for the trouser fly.
ファスナー
ファスナー is the general word for zipper, not limited to clothing or humorous contexts.

Etymology

A humorous euphemism likening an open trouser fly to a 'window to society'. The exact origin is uncertain, but it plays on the embarrassment of exposing oneself in public.