A girl who has hooked up with more than three Pikes (Pi Kappa Alphas).
Jeez, that girl is such a Pike bike! Maybe it's time for her to move on to a different frat.
A girl who has sex with three or more Pike brothers in the Pi Kappa Alpha fraternity.
That girl is a pike bike everyone in the frat gets a ride. That girl got biked, that was the third guy in Pike that she had sex with.