ぶち んじゃう
buchikonja u

Godan Verb (mu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of ぶち込む

1. To shove in; To jam in; To stuff in; To throw oneself into (figuratively); To regret doing (something impulsively)

Completed Action
Colloquial