An inappropriate glance is a look that is considered to be rude or disrespectful. It is often characterized by a lingering stare, and can make the recipient feel uncomfortable or embarrassed. The term 'LEER' is a four-letter word that is used to describe an inappropriate glance. A LEER is a type of glance that is usually accompanied by a smirk or a sly smile, and is often interpreted as a sign of sexual interest.