A fork of Rural Dictionary
It is the higher level of any group.
upper echelon in the military refers to people of higher ranks (usually officers) in everyday life it is in references to bosses and managers and the like
A hoe that retains a certain amount of class. Cleaner than the average hoe, however greasier than the average girl.
I like Nancy, she has experience but she's still clean enough to bring home. A true upper-echelon type hoe.