According to Urban Dictionary, photobombing is defined as posing in other people's photos, without the knowledge of the main subjects, for a later surprise. These sneak attacks never fail to bring a picture from meh to magnificent, which is why they regularly make the rounds on humor websites like Reddit, Collegehumor.com, The Huffington Post, the Cheezburger Networks, and more. Featuring a different photobomb each day, this calendar will have readers laughing out loud and plotting their own sneak attacks every time a camera appears!