noun, plural flat·feet for 1, flat·foots for 2, 3.
- Slang. a police officer; cop.
- Older Slang. a sailor.
- 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
- plural -foots or -feet a slang word (usually derogatory) for a policeman
n. pl. flat•feet (-fēt′)
- 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