When a man and a woman are in 69 position and she is licking his gooch, then the guy farts in her face and he tightens his legs around her neck forcing her to endure the smell. This leading to her screaming like a goose due to her neck being crushed.
Johnny: "Betty? What happened to you and Paul?"
Betty: "Nigga, i broke up with him cause he Goochy Goosed me and i smelled for weeks."
When three people sit side by side and someone else stands facing the middle person. The middle person will be jacking off the two side people while giving head to the one standing so it looks like the middle person is flapping his/her wings while moving their neck up and down....the motion a Canadian Goose makes. They may also make a "honking" sound because they are choking on dick.