おそいかかっちゃう
osoikakacchau

Godan Verb (ru)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 襲いかかる

1. To pounce on; To fall upon; To attack; To rush at; To overwhelm; (Regretful/emphatic form of the above)

Completed Action
Colloquial