Define Mississippi Mudhook Meaning

Mississippi Mudhook
Dirty relative of the Mississippi Meathook the act of controlling the movements of a girlfriend by hooking her in the anus with your finger(s)

I was tickling rocking horse Wendy in bed last night
Did she try to get away?
Yeah she tried but I used my other hand to Mississippi Mudhook her so she wasn't going nowhere.
By Karlotte