The "Hard on Hoes" movement is a movement focused on not putting up with, neither aiding, nor abetting hoes and their actions. "Hoes", in this case refers to poor-quality or substandard otherwise "bad women". This movement shows hoes and their supporters, that their ways are not acceptable, in an attempt to prompt positive change or to deter others from such a lifestyle.
john: are you planning anything serious with tracey?
mike: nah boy, i aint wifin up no slut, hard on hoes for life.