よこしちゃう
寄越しちゃう
yokoshichau

Godan Verb (su)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of よこす

1. Having sent (it); Having gone (there); Regretting sending (it); Regretting going (there)

Completed Action
Colloquial
Usually Written in Kana