ゴマアイゴじゃなかったです
gomāigojanakattadesu

Noun
Desu Copula

The polite, past negative form of ゴマアイゴ

1. Wasn't a sesame ai (a type of pufferfish).; Wasn't a silly/foolish thing.

Past/Perfective
Negative
Polite
Casual Register