Snaking is a form of anal sex. You start out like normal by performing anal sex. You then proceed to ejaculate in her anus. Then let your penis go limp while still in her rectum. Once your penis is limp quickly pull it out and back away. This will cause her anus to convulse and she will shit all over herself and the bed. Hence why you don't do it at your house. This makes the perfect break up sex because she will be so embarrassed that she will never want to talk to you again.
A female (or male) performs fellatio on a group of men consecutively, then immediately repeats the process in reverse order. Whomever goes last in the first round goes first in the second round, and so on. The name is derived from fantasy sports, where a 'snake-style draft' is conducted in the same fashion.
Person Two: Yeah let's put Mike last because he's a rapid reloader
Person Three: Snaking is when...
Bac: Man, I hate those snaking bastards.
Private: Uhh...he's probably snaking somewhere around here.
Dude 1: What have you been doing lately?
Dude 2: Uh....nothing. Just snaking all day.
I am so tired after eating, that I need a couple hours of snaking.
Shelven: "Oh Davis, what did you get up to?"
Davis: "Arghh we made passionate love"
"Shelven: Ohh you've been snaking Davis!
You slippery slimey Serpant"