off the top of my head, in no particular order, all belonging to other people, and most more often that you would want:
sweat, tears, blood, spit, snot, vomit, semen, urine, feces, sweaty balls on the back of my neck, pig flesh, raw chicken, fried chicken, used tampon.
i'm sure i missed some, but the worst thing that i get on me on a regular basis at shows? glitter. can't get the damn stuff off. everything else washes off.