I gave my back to the smiters (see Isaiah 53:5, ad fin.; and comp. Matthew 26:67; Matthew 27:26; John 19:1). My cheeks to them that plucked off the hair. This is a detail not historically recorded by the evangelists; but it may have had a literal fulfilment.
Plucking off the hair was not unknown to the Jews as a punishment (see Nehemiah 13:25). I hid not my face from shame and spitting (see Matthew 26:67; Matthew 27:30). Spitting in the East marked at once contempt and abhorrence.
It is a practice which continues to the present day.