Definition of photobombing in English:
photobombing
noun ˈfəʊtəʊˌbɒmɪŋˈfoʊdoʊˌbɑmɪŋ
mass nouninformal The action of spoiling a photograph by unexpectedly appearing in the camera's field of view as the picture is taken, typically as a prank or practical joke.
the concept of photobombing has probably been around as long as photography
Definition of photobombing in US English:
photobombing
nounˈfoʊdoʊˌbɑmɪŋˈfōdōˌbämiNG
informal The action of spoiling a photograph by unexpectedly appearing in the camera's field of view as the picture is taken, typically as a prank or practical joke.
the concept of photobombing has probably been around as long as photography