1. Childishly immature person fixated on (his/her own) feces.
2. Childishly immature person scared to have a shit for fear of losing some valuable part of the body. By extension, scared to throw out/delete/ any part of his/her possessions. Not to be confused with Control Freak.
That anal retentive bitch won't let her kids go anywhere.
My supervisor's such an anal retentive -- he keeps dragging up everyone's mistakes.