Kris's smiling visage matches the tattoo on his right arm, of his late father Robert, reported Daily Mail online.
Rob revealed the tattoo tribute on an episode of their reality show 'Keeping Up With The Kardashians'.
Kris didn't seem very pleased, although she admitted she appreciated the gesture.
Rob recently revealed plans to return to university, where he hopes to study law.
He took to his Twitter page to make his revelation, posting, "Going to Law School very soon and so excited and can't wait!"
Since graduating from University of Southern California, Rob has failed to find a solid career path, leading to criticism from his family on their reality show.
He has dabbled in business commercials, working for website Rival Spot and his sisters Kim, Kourtney and Khloe's skincare line PerfectSkin.
The reality star then tried his hand in the world of music and co-managed girl band BG5.
Rob also finished in second place on the thirteenth season of Dancing With The Stars alongside partner Cheryl Burke.
