すかしっぺでわありません
すかしっ屁ではありません
sukashippedewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of すかしっぺ

1. It is not a silent fart.; It is not a stealthy fart.

Negative
Polite
Formal Register
Usually Written in Kana