Chemcest
To be a member of a professional chemistry fraternity and to end up hooking-up with a fellow brother.
Leah: So I may or may not have ended up making out with one of our brothers at the party last night.
Deanne: Don't worry. I dated my pledge son. That's the ultimate act of chemcest.
Deanne: Don't worry. I dated my pledge son. That's the ultimate act of chemcest.