Synonyms for the phrase "wink the other eye" include "give a sly glance," "make a subtle gesture," "give a discreet signal," and "send a covert message." These synonyms all convey the idea of intentionally communicating something in a restrained or secretive manner. Another synonym for "wink the other eye" is "flash a knowing look," which implies a shared understanding or inside joke between the communicator and the recipient of the message. Whatever synonym is used, the meaning is clear: there is an unspoken message being conveyed, and the recipient is expected to interpret and respond accordingly.