Drag
Drag clicking is a method that is used to bypass the CPS limit of 20.
It can be done by gliding your finger over the mouse button and causing friction to click very fast.
Is not very easy to do as it requires a lot of practice and a good mouse, as well as a good grip on the mouse. Sweaty hands are a big no-no.
This is very hard to implement as I am not able to do this method myself, so I will simply guess how it works.