noun, noun or participle which takes 'suru'
photobomb
Slang term for unexpectedly appearing in someone's photo, often as a prank. Used as both a noun and a suru-verb.
友達が写真にフォトボムしてきた。
My friend photobombed the picture.
あの猫のフォトボムが一番面
That cat's photobomb was the funniest.