Gainsville handshake
A Gainsville handshake is when you see a butt crack and you put your finger in it like it's the best thing ever.
I did the Gainsville handshake in math class. The teacher didn’t even see it.
I saw my cousin do the Gainsville handshake and I laughed so hard I cried.
I did it in the grocery store and the person looked at me like I was crazy.