i really want this badge but don't know how to do an unending slide

i've looked on other forums and people have said it has to be long and over 300 points

one guy said how to get it and where to do it ,at the circular ramp and drift all the way down but i need something easier because i can't do that...thx to any help given^_^

Try using a car that you can slide with, but still control.
I found the Ferrari F50 GT to be suitable for drifting, otherwise, keep at it.