The mambis is a male being whom (when blessed with the God given physical capability) accidentally bites its own penis off. This usually leads to the death of the mambis because the mambis tries to put the severed penis back on, instead of seeking medical help.
the female mambis is difficult to pinpoint. they are classified as a mambis because their most recent past life was cut short do to a solo wang biting accident.
Charlie: Quit yer bitchin, ya mambis
Mambis: Oh God! Does anyone know how to reattach a severed penis?!