In the event of a zombie apocalypse or alien invasion women will only slow men down which will potentially result in death. Also it will be highly inconvenient to deal with them on their periods. "Nomadic Pimpin" is the act of sticking with one group of women (and having sex with them) then ditching them after two weeks for your own survival and moving on to another group of women where you then repeat the cycle.
"I still want to have sex in the zombie apocalypse but don't want women's lack of survival skill to kill me, so I will just do some nomadic pimpin"
"Women are going to suck to deal with during a zombie apocalypse"
"Bro, that's why we're nomadic pimpin"