I had this tattoo like years ago. Om Mani Padme Hum. This is a Tibetan mantra, represents of Hail the Jewel in the Lotus. Every monks in Tibet praying with this mantra, every time they have to hike through the mountain for the sake of worship.
Ohm means as a symbol of one impure body, speech and mind same as Buddha. It is capable to remove our negative attributes and achieve an enlightenment path. Mani as a Jewel, means it is capable to remove poverty and concerned to eliminate worry and brings peaceful. Padme, with its lotus symbol, means wisdom. Keeps you out from contradiction. And, Hum, means inseparability that symbolizing purity and can be achieved by the unity of method and wisdom. Overall, this sentence represent wisdom and peace. This tattoo doesn’t affect me physically, but I respect the meaning of it. Indirectly i believe this mantra can really lead us to a positive way of life. I do..