It’s Joe Jonas’ Tattoo!
That tat you saw before belongs to Joe Jonas of the recently reunited Jonas Brothers! He and his brother Nick actually went to the parlor to get inked up together, but Nick got the word 'Mercy' in script, while Joe received this African Adrinka symbol on his forearm.
The African Adrinka originated in the western portion of the continent and means "help me help you" -- it also has an overall symbolic meaning of cooperation. It's a wonderful message of peace and caring for your fellow man, and we're glad to see that the former Disney star is setting a good example for his younger fans.