This can be hard to get in Carreer mode, so I used a Custom Event to get this achievement.
Select Custom Event, Endurance, 40 minutes, very easy, only visual damage, unlimited flashbacks and for the track use Chicago, Wabash Run as this track is small so lapping a contender is easier. You can pick any car you like, I chose a Tier 1 car.
It should take about 5 minutes before you reach the competitor at the back of the pack. Lap this one, and the achievement immediatly pops. You do not need to finish the race.
Holygrail311 also had a good remark, you can boost this with a friend in a private match. One person drives very slowly (as standing still kicks you), while the other person just races around the track until you pass your boosting partner.