Most human noses tend to accumulate a fair bit of natural skin oil, particularly in the crease where the nose joins the face. A lot of nose grease ends up on camera backs below the viewfinder (and on the LCDs of a lot of digital cameras), where it serves no useful purpose at all. But fearlessly imaginative and presumably non-squeamish photographers have found a multitude of uses for this renewable natural resource.
For example, you can apply nose grease to scratched negatives in order to fill in light scratches and minimize their appearance on a print. Or you can use nose grease as a light lubricant for moving parts on old mechanical cameras. Naturally this practice is a bad idea if you wear a lot of skin makeup.
nb: this is not a joke definition.
Entry last updated 2002-04-03. Term 845 of 1487.
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