A series of events in which many people are consequently ditched. These series of "ditchings" all happen in an unintentional and unthinking manner. Hence, the ditching chain is completed.
You can only break the ditching chain by ditching the ditching chain by which you would have to unditch someone and go out with them.
"The plane ditched the girl, the girl ditched her boyfriend, in addition, the boyfriend ditched his friend at the bar, and, finally, the friend ditched the teacher at his tutoring classes."
"The tutoring teacher ditched the ditching chain by attending to her sister's birthday party and not ditching her."
Timmy: Oh man, I didn't do my homework because I have a life outside of school.
Bobby: Oh yeah me, too. Just ditch class and you'll be fine.
Timmy: Wait what's ditching class?
Bobby: Just skipping class and doing something more productive.
Probably the only thing you'll remember from high school, besides that time you snapped Mr. Wendell's ass with a towel.
Often, those who are ditching school will claim to be sick, or kill off a family member to claim the class-free days allotted by the school for just such an occasion.
When asked where a ditching student is, present students will often claim that he or she got hit by a bus and has passed away, so that they might claim a class-free day as well.
Those caught ditching are reprimanded, and consequently mocked and degraded by their peers.
Teacher: Is Sean ditching school?
Student: No, he got hit by a bus.