Photo vom 

Inserting oneself into someone else's picture while vomiting, unbeknownst to the people taking the picture.

Nina photo vommed some tourists on the steps Rocky ran up after a long and hot run.

Photo vom by Greg123456778 June 8, 2015

Photovomit 

A more intense experience than being photobombed, being photovomited is exactly as it sounds, the photo sabotaged by a sudden spew of vomit.

It would have been an awesome pic if it hadn't been photovomited by a sudden projectile puke from Courtney's baby.

Photovomit by Kanga & Roo May 28, 2017