verb (used with object)
to ruin (a photograph) by appearing in the image
without the photographer’s knowledge, often in some dramatic or comical way: My brother photobombed what would have been a nice photo of my grandma and me.
to do this to (the subject of a photograph or the photographer): I thought I had a great picture, but I got photobombed by a pigeon flying by.
a photograph that is ruined in this way.
Origin: Related forms
2005–10; photo + bomb (def. 16)