かじっちゃう
齧っちゃう
kajicchau

Godan Verb (ru)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of かじる

1. To nibble on; To bite into; To take a bite out of; (Regret/completion of biting)

Completed Action
Colloquial
Usually Written in Kana