Commonly misunderstood to be the central player in an all male three-way, a "quimby" is actually the male in two woman three-way. Selected by choice bi-curious trim for his long, never-flaccid penis, "quimbies" have been spotted whiffing the occasional bike seat and, upon request, tossing a nicely-groomed woman's salad.
Other common misuses of the word involve chickens and farts.
A middle school. Like many schools, students attending there normally travel in large packs or small groups. However, there will most likely be a few loners wandering around the school campus.
If you lie low enough, you won't notice the inherent chaos.