I'm sure somebody will correct me if I'm wrong, but I don't think there's any hard-and-fast meaning for the term. I sometimes use it myself in the context of 5/3/1, where the top workset is done "for reps." For example, in wave 3, your top workset is a single at the prescribed weight, but you actually go "for reps," adding as many reps to that single as you can. I suppose the same usage could be used for a bodybuilding context or any program that called for doing reps to failure or near-failure.
Saying "for reps" in the context of the SS novice progression or TM would be a little silly, since your target number of reps are fixed.
Anybody else chime in if I'm not in touch with the zeitgeist on this one.