It's the opposite of a eulogy. Instead of speaking of a dead person's better qualities and praising them for their life achievements, a fuckeulogy focuses on the dark side of the dead person and all the misdeeds they have done. Fuckeulogies are reserved for those who are universally hated by the masses, and who will in no way, shape or form be missed when they die. It boils down to delivering the final 'fuck you' to a dead person at their funeral.
People who would qualify: Hitler, Mussolini, Stalin, Saddam Hussein, Gadaffi, Kim Jung Il, Osama Bin Ladin, etc.
The term was coined by satirist and comedian John Oliver (seen on 'The Daily Show' with Jon Stewart). Oliver coined the term on his Podcast 'The Bugle' with Andy Zaltzman (episode 152).
Dumping Osama Bin Laden's body into the sea robbed the survivors of the 9/11 dead of delivering a decent fuckeulogy.
A vitriolic eulogy in reverse given to mark the passing of someone who's death will not only not be mourned but is to be broadly welcomed. First coined by John Oliver on The Bugle podcast on 6th May 2011 on the occasion of the death of Osama Bin Laden.
"(sings)Shot in the eye, and you're to blame, you give c**ts a bad name. This is not so much a tribute episode to Bin Laden as a special fuckyoulogy to the big man..He's gone from leader of the worlds tedious minority interest pressure group... the man commonly known as the Rowdy Saudi, Terry The Terrorist, The Mighty Douche, The Tora Bora Law Ignorer and the Angry Turnip.."