Although
the original Freudian idea of the evolution of the character through various stages like the "anal stage", at each of which it was possible to get stuck, has not really stood the test of time, many outside the
psychological community feel that it's still worth having a term for those backed-up individuals one occasionally encounters who have an abiding need to stop fussing about
something or other and relax, unclench, and *blow it out their ass*. For this, "anally retentive" (or simply "anal") will serve as well as anything.