ひょうきんじゃないです
剽軽じゃないです
hyōkinjanaidesu

Noun
Desu Copula
na-Adjective
Negation Auxiliary

The polite negative form of ひょうきん

1. Not lighthearted.; Not frivolous.; Not cheeky.

Negative
Polite
Casual Register
Usually Written in Kana