なが んじゃう
nagashikonja u

Godan Verb (mu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 流し込む

1. Pouring in/down (and it's done); Spilling (and it's done); Gushing (and it's done); Letting flow (and it's done)

Completed Action
Colloquial
Computing