Angel Lust

Came across this term on Six Feet Under, and then found the following definition at urbandictionary.com:
'Angel Lust' is slang used to describe the erection males sometimes develop after they die traumatically. They may even ejaculate during the final throes of death. During war time it's not uncommon for soldiers to put their dead naked enemies who have 'Angel Lust' on display as 'War Trophies.'