flat foot noun
[count] 1 plural ∼ feet : a foot that is flat on the bottom so the entire sole rests upon the ground — usually plural ▪ He has flat feet. 2 usually flat·foot 
/ˈflætˌfʊt/ plural flat foots US slang, old-fashioned : police officer
/ˈflætˌfʊt/ plural flat foots US slang, old-fashioned : police officer
