The Evolving Bull
This tattoo stands for progress and growth. The Rock had his famous bull tattoo reconfigured so the horns were no longer facing up and out. He wrote in his Instagram caption of the transformation that they're "pointing straight ahead representing relentless energy and forward progress."
He also wrote that the energy in the eye is "always alive and ready to disrupt the universe and love and protect my family and all things I love with intense passion and gratitude."