To bring your lady friend around to the back of the car where the auto's jack at. You have the ho, you have the jack, now comes the slap. Not meant to be taken as a true threat (or performed)--just to indicate a state of frustration. Example: If you don't calm down, someone is geting a ho-jack-slap.
HO-JACK-SLAP
Meaning of HO-JACK-SLAP in English
Slang English vocab. Английский сленговый словарь. 2012