1. photobombing - Noun
2. photobombing - Verb
photobombing (uncountable)
The practice or phenomenon of making an unexpected appearance in a photograph, especially with the deliberate intention of ruining it.
photobombing
present participle of photobomb
Simons’s grinning mug can be seen in the background, behind Harris — photobombing before it was a thing. Source: Internet
When an already fantastic image of a photobombing Quokka is brilliantly crafted into the classic Disaster Girl meme it's a match made in heaven. Source: Internet