* AscendedExtra: Gary Holt was a longtime friend of the band and a ''very'' skilled musician in his own right who went from a temporary live fill-in to a full-fledged new member after Hanneman's passing.
* AuthorExistenceFailure: Jeff Hanneman's death has forced Kerry King to do all the guitar work for the band's upcoming album aside from some leads from Holt. It's expected that the album, if and when it's released, will be dedicated to Hanneman.
* CowboyBebopAtHisComputer: When Jeff Hanneman passed away, several newspapers wrote an obituary that featured the image of Gary Holt, the band's backup guitarist during Hanneman's recovery.
* {{Fan Community Nickname|s}}: The Slaytanic Wehrmacht.
* MeanCharacterNiceActor: Despite his scary stage persona, Tom Araya is, by all accounts, a very friendly guy.
* NoHitWonder: They've sold millions of albums worldwide, but have never even bubbled under or had a Top 40 hit on rock radio.
* OldShame: ''Diabolus in Musica'', especially, is this to Kerry King.
* ReclusiveArtist: Jeff Hanneman, to some degree. The other members were quite happy to hang out with fans after shows and regularly gave interviews, while Jeff would almost always retire to the bus to read and seldom gave interviews. Outside of touring and recording, his bandmates seldom heard from him; most of his free time was spent with his wife. While people criticized King for calling him a dear friend despite having not seen him for several months prior to his death, the truth was that even if you were one of Jeff's buddies, seeing him on a very infrequent basis was perfectly normal and expected.
* WhatCouldHaveBeen: In 1984, Jeff Hanneman and Dave Lombardo started a HardcorePunk side project called Pap Smear, joined by Music/SuicidalTendencies guitarist Rocky George. They had written many songs together and were planning on recording an album, but Creator/RickRubin advised against it, thinking it would lead to Slayer breaking up. Two of Hanneman's Pap Smear songs, "DDAMM" and "Can't Stand You", were re-recorded by Slayer on ''Undisputed Attitude'', since he considered those the two best songs the side project produced and thought they'd fit in with all the HardcorePunk and PunkRock {{Cover Version}}s on the album. Hanneman has also said that from time to time he would reuse riffs that originated with Pap Smear for Slayer songs.
** According to Tom Araya, ''Undisputed Attitude'' itself could have turned out very differently: It was always meant to be a CoverAlbum, but originally they set out to cover HardRock and early HeavyMetal artists such as Music/JudasPriest, Music/DeepPurple, and UFO, as well as Music/TheDoors. The songs they were working on "didn't sound right", so they shifted direction towards punk and hardcore instead.
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