A person, usually female, who lacks the appropriate amount of musculature in the gluteus maximus, i.e. (s)he has nor booty. Bastardization of "no ass at all". Although this word sounds like a medication for an ailment (perhaps this very one), it is used to describe the condition. Antonym: junk in the trunk or simply " J in the T"
"Damn! That skinny chick has a bad case of noassitol."