• БЫТЬ ПО СЕМУ obs, now humor
[sent; Invar; fixed WO]
=====
⇒ (used to express the speaker's agreement with, support of some suggestion, idea etc) let it be that way:
- so be it.
♦ Предоставить актерам его высочества герцога Орлеанского... зал в Малом Бурбоне, утвердить им пенсию, незначенную герцогом Орлеанским. Играть им в очередь с итальянской труппой... И быть по сему! (Булгаков 5). It was decreed that the Players of His Highness Due d'Orleans...be given a hall at the Petit Bourbon and confirmed in the pension declared by the Due d'Orteans. They were to take turns with the Italian troupe. ...And so be it! (5a).
—————
← Originally, the written formula phrase used by tsars and tsarinas at the end of official documents to express their support, approval etc of the material contained therein.
Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. С.И. Лубенская. 2004.