Jack a Doodle Doo
When two people go from zero to third base in one go, making a loud chicken sound and getting way too turned on.
My brother and his friend were doing it in the garage and shouted 'Jack a Doodle Doo!' when they both came.
My teacher said 'Jack a Doodle Doo!' when she saw her boyfriend in the staff room.
My friend’s dog barked 'Jack a Doodle Doo!' when it saw its owner doing it with the neighbor.