PDF (acronym)
PDF is an Acronym which stands for - "Passive Dick
Face"
It's the male equivalent of RBF - "Resting Bitch
Face"
not to be confused with .pdf (Portable Document Format), which is
owned by the Patent Trolls at Adobe.
Her: "Most guys don't approach me, because I
avoid direct eye
contact, and I suffer from
RBF."
Him: "Most gals avoid me because my PDF makes me seem psycho, but If you get to know me, I'm chill."