dormcest n. (at a university or college) a romantic or sexual relationship with a person who lives in the same coed residence hall. Also hallcest, floorcest. (source: Double-Tongued Dictionary)
Further reading
It was a dark and stormy night. So begins the long and increasingly convoluted prose of Edwards Bulwer-Lytton’s best-known novel. Today the annual Bulwer-Lytton Contest asks contestants for fanciful first sentences that are similarly...
Throwing cheese and shaky cheese are two very different things. In baseball, hard cheese refers to a powerful fastball, and probably comes from a similar-sounding word in Farsi, Urdu, and Hindi. Shaky cheese, on the other hand, is the grated...
“Dormcest” and “floorcest” were definitely in use in ‘93 at the Ohio State University. No citations to offer, but I heard it plenty when I started dating a girl from my floor.