When, somehow, a little bit of shit ends up on the underside of the tip of a penis.
When a man sitting on a toilet after takin a crap wipes his ass from back to front. And without realizing it brushes his soiled tissue under the tip of his penis. As his partner later on unzips and strips him, he or she, while looking at his unit straight in the eye, notices a 5 oclock shadow.
This term- means when a guy has gorgeous, long hair (at least shoulder length).. and these people comb and take care of their beautiful hair in public.
The leader of silverchair used to have 12'oclock hair in the music video-- tomorrow!