n. 1. A person who clicks by web pages, especially casually or by chance.
2. Web surfer of sorts.
1. The information in my blog will most certainly add a wrinkle to some fortuitous clicker-by's brain.
2. The enormous boobs on that hot chick abruptly caught the attention of the innocent clicker-by.
3. The hacker created a web page where a careless clicker-by may unknowingly download a virus.