The act of wasing one's hair (on one's
noggin), and applying the leftover shampoos to one's pubic hair.
May sometimes be carried out for masturbational purpose rather than for hygienic one. Believed to be carried out often by a
Jacob, and possibly by a Thomas.
Mum: What the hell were you doing in the
bathroom for the last 30minutes!!??
Jacob: What the hell mum, I needed to shampube.