（用眉眼传情示意） wink and make signs to one another; give sb. a surreptitious wink now and then; lift one's eyebrows and wink as signals to sb.; make faces; signal (to) each other by glance; wink and cast a glance as a signal; wink at (each other):
Some of the smart ones, hiding themselves behind him, wrinkled their noses in a grimace.