Procrastinating, probable bastard.
1. An overdue fetus that was likely illegitimate.
2. One who will most likely do something awful but hasn't gotten around to it yet.
1. As the weeks wore on, Jill didn't have the heart to tell her husband that the child he had waited so long to meet was merely a probastinatard.
2. That probastinatard should have broken up with you much earlier and for a better reason!