冗じょう談だん抜ぬきで

expression

seriously; joking aside; in all seriousness

Used to preface a sincere statement, often after a lighthearted exchange, to signal that what follows is meant earnestly.

• 冗じょう談だん抜ぬきで、本ほん当とうに助たすかったよ。

  Seriously, you really helped me out.

• 冗じょう談だん抜ぬきで、その話はなしはやめたほうがいい。

  Joking aside, you'd better drop that topic.