I bite my thumb at thou! - It’s a total insult. Like when your little brother steals yo

It’s a total insult. Like when your little brother steals your pizza and says it’s better than yours.

I bite my thumb at thou! #PizzaThief

You took my spot on the bus. I bite my thumb at thou! #LunchTableWar

You said I was ugly. I bite my thumb at thou! #FacePalm