if you can't beat 'em, join 'emjoin 'em if you can’t beat 'em TAKE PART/BE INVOLVEDused when you decide to take part in something even though you disapprove of it, because everyone else is doing it and you cannot stop them 斗不过他们就随了他们，随大流 → if you can’t beat 'em, join 'em at beat1(SPOKEN SECT)