When a male fucks a female so hard that she cracks her neck and thus receives a serious case of whiplash. Common practice in Norway but has migrated to Asia and the Americas. Africa has not yet adopted it because let's face it they got enough shit going on.
Gary: Brad, you smash Stephanie yet?
Brad: Hell yeah Gary, gave that bitch a Norwegian whiplash last night.
Gary: Shit is she ok?
Brad: Nah she's in the hospital cuz she broke 3 vertebrae.