nasal grazing

Nasal grazing is when disrespecting other people's privacy has become too excessive or habitual. Figuratively, nasal grazing can mean someone is so comfortable with being "nosey" that they "graze" as they do it. While the imagery of a navel gazer is a person so obsessed with oneself (or a small single-issue) that they are caught staring at their own belly-button, the imagery of a nasal grazer is a person who is so obsessed with other people's information that they are not just being nosey themselves but can be caught grazing on other people's nosiness.

"I hear John keeps a spreadsheet documenting every single piece of information he finds! What a nasal grazer!"
"Don't speak to Sally, she's such a nasal grazer he will start prying into your personal life every single day."
"Looks like Facebook's new terms of agreement are trying to master the art of nasal grazing."