when a tampon "goes rogue", i.e: a girl's stashed tampon (unused, fresh from the box, still wrapped) is left loose in her purse long enough for it to work it's way out of it's plastic wrapping, wandering about freely in only it's plastic applicator among her other belongings. often to then be embarassingly grabbed at inopportune moments, such as when digging for coin change or chapstick.
girl A: "what is that?!"
girl B: "just another rogue tampon. hate it when that happens!"
girl A: "oops, there's another tampon going rogue again!"