The tattoo in question, "an equals sign". She tweeted this picture, which shows the new tattoo along with the heart tattoo she has on her right pinky finger. The picture was captioned, "All LOVE is equal."
Miley also has a cross on the other side of her right ring finger. The three tattoos together would symbolize "God Equals Love."
I wonder if she has bothered to read the Bible to see how God expresses His love, which is MUCH more loving than the far left "anything goes" agenda.