To Purposely Put Yourself Into Someone's Picture
This page is the CodyCross answer for the clue below from Nordic Wonders, Group 1950, Puzzle 2 (Brown Bears).
Question is: To Purposely Put Yourself Into Someone's Picture
and the answer is: PHOTOBOMB
Word Meaning:
PHOTOBOMB — (transitive) To unexpectedly appear in a photograph, especially so as to ruin the picture.
Definitions from Wiktionary.