いうとうしい通しちゃう
iuto ushi chau

Godan Verb (su)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 言い通す

1. To say it through; To insist on having one's way; To carry something through (to the end); To see something through (despite difficulty)

Completed Action
Colloquial