noun
knee-high socks
Wasei-eigo from English 'knee-socks'; refers to socks that reach just below the knee, commonly worn with school uniforms or as a fashion item.
wasei-eigo (Japanese-coined English), from knee-socks
制服には白いニーソックスを合わせることが多い。
White knee-high socks are often worn with school uniforms.
彼女は黒のニーソックスをはいている
She is wearing black knee-high socks.