the act of allowing an automobile to approach the car ahead because the driver has set his cruise control but is not paying attention to traffic conditions. the noun form of the phrase is "cruise control creeper."
while driving down a two-lane country road, i noticed in my rear view mirror a large foreign sedan approaching my car from behind. his speed was almost the same as mine, just a little quicker, so his approach was pretty slow. still, he kept on getting closer, until i could no longer see his front bumper. suddenly, just as i thought he was going to ram me, he swerved left and passed me at a rapid pace, glaring at me as he passed. he left me behind at the same slow rate as he approached me. i figured he was cruise control creeping, because he was gabbing on a cell phone. to avoid becoming a cruise control creeper myself, i reset my own cruise control and let the other car go about his merry way. after i flipped him off.