Definition of flatfeet:
(n) :
(medicine, chiefly in the plural) A condition in which the arch of the foot makes contact with the ground.
(n) :
A person having the above condition.
(n) :
(colloquial, archaic, derogatory, law enforcement) (plural typically flatfoots) A policeman.
(n) :
(US, informal, military, slang) A sailor.
(v) :
To walk around in the course of work, especially when investigating.
(v) :
To dance in the style of Appalachian clogging.