What is "snoopiness"

Usage examples of "snoopiness".

While he did this I sneaked at look at his book-a form of snoopiness I can't resist.

While he did this I sneaked at look at his book—a form of snoopiness I can't resist.

While he did this I sneaked at look at his book-a form of snoopiness I can’t resist.

Perhaps it was mere snoopiness, the desire to find out what was under there.

No luck with the side windows in the front room and dining room, but my snoopiness paid off with the kitchen.