flatfoot

noun, plural flat·feet for 1, flat·foots for 2, 3.

1. Pathology.
   1. a condition in which the arch of the foot is flattened so that the entire sole rests upon the ground.
   2. Also flat foot.a foot with such an arch.
2. Slang. a police officer; cop.
3. Older Slang. a sailor.

noun

1. Also called: splayfoot a condition in which the entire sole of the foot is able to touch the ground because of flattening of the instep arch
2. plural -foots or -feet a slang word (usually derogatory) for a policeman

n. pl. flat•feet (-fēt′)

1. A condition in which the arch of the foot is abnormally flattened down so that the entire sole makes contact with the ground.splayfoot talipes planus