This is the 17587th most frequent Russian word.
трясучкой
"Трясучкой" refers to "shaking" or "shivering" in a colloquial sense, often describing a trembling motion or condition.
The word "трясучкой" is used to describe the shaking motion associated with the road condition.
Машина двигалась по дороге с трясучкой.
The car moved along the road with a shake.
Here, "трясучкой" illustrates the person's sensation resembling shaking after horse riding.
После долгого катания на лошади он чувствовал себя трясучкой.
After a long ride on a horse, he felt like a shaking motion.
In this sentence, "трясучкой" depicts the trembling action due to cold temperature.