"The glad eye" is a colloquial term used to describe an admiring or approving look that someone gives another person. There are several synonyms for this term, including the "come-hither look", the "leer", the "smirk", and the "wink". Each of these synonyms conveys a similar meaning to "the glad eye", but with slightly different implications. For example, a "come-hither look" suggests that the person giving the look is inviting the other person to approach them. A "leer" suggests that the person giving the look is being lecherous or creepy. A "smirk" suggests that the person is being sly or mischievous. And a "wink" suggests that the person is sharing a secret or being playful.