Someone typically of African descent dragging his long schlong down the back of your mom's throat, sometimes expanding it to the point of her being unrecognizable. You, as a son/daughter, are obviously watching this play out live in person, sometimes you join in, sometimes not.
Real white guy: Dude yesterday my mom gave that SLOPPY TOPPY GOOSE NECK to Tyrone. I had to join in because I am not a racist white nationalist who hates gays.
Something very energetic, explosive or fast. Origin unknownfor sure, but follow a goose around for a while and you'll probably find out where the term comes from...
Coach: Get round that race track like crap through a goose!
***
Husband: Honey, we're gonna be late. Get down the stairs like crap through a goose!