What does 5 car pile up mean?

5 car pile up meaning in Urban Dictionary

a sexual work which whenever 5 homosexual men (or a mixture between people nevertheless the females have to have a strap on's) stant about 5 feet from eachother while one bends over on the bed plus they all encounter both, ensuring their particular dick/strap on increases the ass of the individual in front of them in a verry quickly plowing session. (it may additionally be a 10 automobile pileup if there are more people)