Meaning of honi soit qui mal y pense*

ho•ni soit qui mal y pense

Pronunciation: (ô-nē swa' kē mal ē päns'), [key]
— French. French.
  1. shamed be the person who thinks evil of it: motto of the Order of the Garter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.