The tendency for men to resort to their primordial caveman tendencies when they are without women for an extended period of time.
Us guys went camping in the wild last week, and after a couple of days we were doing some serious neandering. Tom caught a 10" trout with his bare hands. Dick killed a squirrel by throwing a stone at it, and Harry started a fire by rubbing 2 sticks together.
(n) A human that does not look evolved and has a more primitive, ape-looking face as if they were partNeanderthal. Usually caused by chain smoking for an extended amount of years.
"Becky, a Neanderman, was captured today by scientists mistaking her for the missing link."