on the slick side
secretly, occurring without most people's knowledge. often refers to a surprising trait or event.
I thought my teacher was really lame, but I found out she listens to mix tapes on the slick side.
A side slick swirl kick
What Ryu and Ken say on Streetfighter when they do the spinning kick. This is not really what they say but it is what people usually refer to the move as because what they say is just too difficult to understand.
The other day me and my friend were playing Streetfighter and I beat him with the move A Side Slick Swirl Kick!