Verb: photobomb 'fow-tow,bóm- Unexpectedly appear in a photograph as it is taken, esp. intending to spoil the picture or as a joke
"His little brother photobombed their romantic selfie"
Noun: photobomb 'fow-tow,bóm- An instance of photobombing
"The celebrity's romantic moment was ruined by a fan's photobomb"
Derived forms: photobombing, photobombed, photobombs
Type of: disturb, interrupt
Encyclopedia: Photobomb