Female equivalent to "man up" with same connotations of bravery, duty, endurance, etc.
(mother to daughter) "Ginnie Mae tole me Festus had done stoled the grocery money for crack again. I tole her she best ma'am up and burn his ass up in bed for the insurance money."
When a woman needs to "Man up" about something....
Quit whining about it and "Ma'am up"