jump sex
when you are having sex on your floor and you get up and jump off your bed landing on your girlfriend and sticking your dick into her vagina.
"I jumped off my stairs last night and made my girlfriend's vagina bleed with my awesome jump sex."
sex jumped
when one is on top of the other while passionately hooking up
if one person is on their hands and knees, and the other is below them lying down, that is getting sex jumped