A tooty ta - You give the thumbs up, stick your tongue out, shut your eye

You give the thumbs up, stick your tongue out, shut your eyes tight, and then you slap your butt with your hand like you're punishing it.

My cousin did a tooty ta in the middle of the school hallway and got detention.

I did a tooty ta during the principal's speech and she fainted.

My dog did a tooty ta and knocked over the whole bowl of treats.