the morbid aroma one can tell by entering the room. the dandruff on ones head is noticeable, with streaks of fine gray hairs as well. often is horny with pimples on the back. to be a skedge is very rare so if you see one, the chances next time will be slim to none
a mate of a mate came up with this one: it defines the smell/residue left between the fingers after playing a girl like a glove puppet. it came up in conversation as we discussed spaff and other ejaculate nouns.
can't really think of an exemple, skedge is what it is.