Something that has taken an un-normal approach or result to vaguely meet the primary goals and objectives. As in, “she's pretty rough,” could mean that she (i.e., car, Sheila, etc.) is hard to look at without comment of criticality. Or, an effort to generalize the approximate target. For example, if meeting your 'mate' at 5pm (1700), one might consider stating, “ C'ya arvo, roughly 5.”