void ab initio
Latin for "void from the beginning." A judgment that is void ab initio is treated as a legal nullity — as though it never existed — rather than as a valid judgment later cancelled. The distinction matters for the fees question the court is wrestling with here: courts ordinarily have wide discretion to condition vacating a default judgment on the defendant paying the plaintiff's attorney's fees, but if the judgment was a nullity from the moment it was entered, there is arguably nothing to condition — the court simply has a nondiscretionary duty to erase it. That is why the court expresses doubt about its power to award fees even while stating that, if it had the discretion, Stewartson's conduct would warrant it.