angel lust
n.— «A death erection (sometimes referred to as “angel lust”) is a post-mortem erection which occurs when a male individual dies vertically or face-down—the cadaver remaining in this position.» —“Top Ten 10 Craziest Science Stuff You Didn’t Know” Sigmund, Carl and Alfred Feb. 19, 2008. (source: Double-Tongued Dictionary)