photobomb /ˈfəʊtəʊˌbɒm/noun 2verb 1forms 3 noun2 •An act of photobombing.His^([sic]) person who uploaded the video, who appears to be Ellis' father, wrote in his description that the photobomb was not the only surprise welcome they staged that day. — 2012 •A photo containing someone or something that is photobombing. verb1 •To unexpectedly appear in a photograph, especially so as to ruin the picture.Edmonton Eskimos fans taunt a Calgary Stampeders mascot who photobombed their group photo. [image caption] — 2010 formsphotobombed · photobombing · photobombs