When you are giving a girl anal sex so rough that you cause shit to come out. Then while you go out the shit goes all over you but then when you go in it splashes to the side like a snowplow!
Guy: Hey Gabe! Wana come over and do the norwegian snowplow later?!
Girl: Why shure Bobby Walter! I can't wait to have all your 2 inches inside me! That would be the best time ever!
When you are doing doggy style on the ground, however, the receiver has their arms held behind their back and they are being pushed along the carpet by their chin. Thus, receiving a carpet burn on their chin. Warning, it's not to be confused with Reverse Carpet Snowplow.
"Did you see Kylin this morning? She defs did the carpetsnowplow last night, her chin is inflamed"