The attitude that often comes with Frump. Frumppy girls usually have bad attitudes, make gross frump faces of being upset(typically pursing/curling the lips the frumpier the state) and speak with a nasal tone which increases with level of frump. Frump can be used for girls and guys.
John: Why is Janice frumping to hard today?
Jill: She got a D on Calc, so she is frumping a little more than usual.