What is the meaning of Flatfoot?

A condition in which the arch of the foot makes contact with the ground.

A person having the above condition.

(plural typically flatfoots) A policeman.

A sailor.

To walk around in the course of work, especially when investigating.

To dance in the style of Appalachian clogging.

To gulp an entire drink (bottle, glass, can, etc.) without pausing between swallows.

To perform an action inefficiently or awkwardly.

To wrong-foot.

Source: wiktionary.org