The Racing Au is a phrase that can be used to describe two very close friends, usually one being significantly taller than the other.
“Racing Au” can also be used to describe a situation where a person has died, in most cases being either injured or killed by a car or in a car accident.
The term Racing Au also is used to highlight a strong bond between two people, a friendship that is almost brotherly and probably dangerously codependent.
And lastly, “Racing Au” is commonly used to describe a person who is seriously addicted to harmful substances or a person who is extremely depressed. In more unpopular situations, Racing Au is used to describe those who hallucinate substance abusing rodents.
person 1: *sees two people* “omg that’s so racing au”
person 2: “Ikr, i wonder if the short one likes cars?”