UFC star Sean O'Malley just brought the meaning of self-love to a whole 'notha level ... by getting a tattoo of himself on his neck!!!
The heavily tatted bantamweight fighter decided to add to his ink collection this week ... hitting up tattoo shop The California Dream in North Hollywood.
Romeo Lacoste -- owner of the shop -- posted photos of himself workin' on the 26-year-old on Instagram ... immortalizing his jump shot celebration after knocking out Thomas Almeida in March at UFC 260.