It's called a "skipping kouchi" because you skip towards uke's target leg, which is far away.

i) This technique can only be done in a kenka-yotsu (opposite stance) situation. It cannot be done in an ai-yotsu situation because the angle of the body does not allow for the kouchi-gari reaping action to work properly.
ii) If you are a right hander, you skip towards uke's right leg.
iii) The skipping action involves the right leg taking a step and the left leg following suit but also doing a bit of a back-step.
iv) The reap is towards uke's front and tori's knee has to be pointing towards the front, not the back.