Sorry to crash, but a lot of you have great ideas on sorority tattoos! I have always wanted a Phi Sig tattoo, but I never wanted letters. I was thinking of getting a red rose with our open motto in greek along the stem.
My one TBS sister wants to get a tattoo of a treble clef going from green (chapter color) to blue (national color) with a butterfly sitting on the clef (chapter mascot) so people would be able to see it, but only our chapter sisters would know the meaning. Its awesome.
Oh and a bit ago - I forget where I was, but I saw a few quatrefoils and completely thought about Phi Mu!