Flipping Someone Off With Your Thumb
It means you want to engage in sexual acts with the person. Instead of only using your middle finger to give someone the bird, adding your thumb let’s said person know you want to get it on with them.
Kyle: *Flips girl off with thumb*
Girl: “He flipped me off with his thumb. He wants to fuck! Flipping someone off with your thumb means they want to do it!”
Girl: “He flipped me off with his thumb. He wants to fuck! Flipping someone off with your thumb means they want to do it!”