A few quick terms that made need referencing:

kill: a death as caused by the main murderer (i.e. Jason Voorhees or Michael Meyers).

killcount: the number of kills in a given period, usually the entire movie.

confirmed kill: a verifiable, undeniable death. Most kills are unquestionable, but sometimes, you just can't tell. Example: many of the partyers in Freddy's Revenge are never seen dead, dying, or injured, so they can't be confirmed. On the other hand, Carlos' death in Freddy's Dead is undeniable, even though we never see exactly what happened to his waking body. It's also not essential to know who exactly died, and in some cases, it's downright impossible.

non-canonical: a movie which doesn't apply any of its events to later movies, and may chose to ignore earlier ones. Example: Jason Goes To Hell: The Final Friday bends the Voorheese Curse around a bit, turning Jason into a demon that jumps from body to body, and eventually sends him to Hell. This is totally ignored for Jason X, which, given the ludicrous plot, is considered non-canonical as well. Of course, a later sequel can re-canonize a previous sequel--using the same example, if Freddy Vs. Jason is taken as canon (and it supposedly is), then Jason Goes To Hell is made part of the fixed plot line...it's a confusing mess, trying to sort through 11 movies worth of plot, but that's what The Bagman's here for.

background kill: a kill we never see, but we know happened (Paul in Friday The 13th Part II or Carlos in Freddy's Dead).

multi-kill: more than one kill simultaenously, like Gibb and Glowstick Boy in Freddy Vs. Jason.

non-standard killer: a kill by someone other than the lead killer (Vic in Friday The 13th: A New Beginning...).

survivor: anyone who's been threatened with death or bodily harm in the film, but doesn't get killed. Usually there's only one, and they're the key to beating the bad guy, but not always (Yvonne in The Dream Master). A large purpose of the Survivor is to come back in the next film and--usually--get killed early along (Nancy from A Nightmare On Elm Street and Dream Warriors or Alice from Friday The 13th and Part II); in stark contrast, Tommy Jarvis from Friday the 13th (The Final Chapter, The New Blood, and Jason Lives). Even more so are Halloween's Lori Strode (4 times: Halloween, Haloween II, H20, and Resurrection) and Dr. Loomis, who lives a record 5 times out of 6 parts!

fodder: also referred to as bait, red-shirts or fresh meat, these are people who you know from minute one won't make it through the film alive. Friday The 13th is famous for its stunning array of fresh meat--there's virtually never more than one survivor, with the rest dying horribly painful deaths.

finale: a kill at the very end of the film (Marge Thompson in A Nightmare On Elm Street or The Coroner in Halloween: Resurrection's alternate endings).

alterna-kill: in a few cases, because of the existence of multiple versions of a movie, the way someone dies (or appears to die) is not consistent. Generally, BodyCounting considers the most current release of a film to be the defining one; unfortunately, these are not always the best ones, but tracking down the obscure German SVCD version of a movie just to see a different death sequence is not worth it.

finishing move: how the survivor(s) do away with the killer this time 'round. In many flicks, it's perfectly fatal, but if the sequel rolls around, get ready for some plot point that gives the psychopath invulnerability or immortality. There's sometimes not even a finishing move: Angela from Sleepaway Camp is never stopped, ever, instead getting away each and every time somehow or another. Supernatural killers tend to thrive on this, too--Pinhead from Hellraiser can be put back in his box...but not forever, and he's certainly not gone.