くすぐっちゃう
擽っちゃう
kusugucchau

Godan Verb (ru)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of くすぐる

1. To rub/scratch (and stop); To mess up; To spoil; To ruin

Completed Action
Colloquial
Usually Written in Kana