any one person or persons who lacks common knowledge and sense. Hooby Hoobies are easily confused and are extremely forgetful.
"My boyfriend put an entire tablespoon (tbs) of salt into our casserole, when the recipe called for a teaspoon (tsp). He is such a Hooby Hooby."
Another name for sexual intercourse.
Laura: See that boy over there?
Tara: What, the red one?
Laura: Yes, Jensen wants to have hooby hooby with him.