"Get out of my house!"
— Jeff

Jeff The Killer is a creepypasta character and a minor antagonist in SuperMarioLogan. He is protrayed by Logan and Lance's cousin; Matthew Thirtyacre.

In Happy Halloween!, he appears as one of the main antagonists. It is known that he is afraid of chickens and he doesn't like people walking into his house. If someone does either of these, he'll try to shoo them away with whatever his holding. He also mocks Jeffy.

Likes and Dislikes


  • Killing (Creepypasta version)
  • Copying Jeffy


  • Pumpkins (got over fear)
  • Jeffy
  • People going into his house
  • Chickens
  • Mario
  • Raccoons


  • Jeff is not a psychopath in his SuperMarioLogan version, instead being an awkward person who is afraid of chickens and pumpkins. He gets over it when he steals Jeffy's candy.
  • It is unclear whether the character in SML is supposed to actually be Jeff the Killer or just someone in a Jeff the Killer costume.
  • It is revealed in an SML livestream that Logan's cousin Matthew plays Jeff the Killer.
  • In the Creepypasta, he is a teenager but in SuperMarioLogan, he is an adult.
  • In the thumbnail of Jeffy's Sleepover!, there is a picture resembling him.


  • "AGH!!! AHHHH! AHHHH!!!"
  • "Well I'm afraid of chickens!"
  • "Just leave!"
  • "I'm afraid of pumpkins!"
  • "Fine, just get out of my damn house!"

Main characters MarioBowserBlack YoshiChef Pee PeeBowser JuniorJosephCodyShrekRosalinaJeffyBrooklyn T. Guy
Recurring characters GoodmanJackie ChuTyroneJudy
Minor characters Doofy The DragonToadCharleyyyTony The TigerWoodyMargaretLuigiCraig The DevilScrewballMr. PigPeachThomasKenPatrickPink YoshiPrincipal SteinbeckHarold WilfredJudyDonkey KongDiddy KongGolden ThomasHanselKirbyChris the CucumberFelipeThe RatEmily ColemanPixie GoblinSamanthaWarioWaluigiSimmonsBrooklyn Guy's WifeTyreeseTom BradyMr. WinkleCarlosCandyCandy's FatherMickey MouseRay CheesyD-Money JuniorJackie TwuMine! BirdBaby MarioLoan DolphinSonicChef Poo PooChompyBully BillThe AlienDr. Fredrick FinkleshitsJacques Pierre FrançoisCrystalHarambeBarack ObamaMr. DinkleThe Alien's WifeTerranceMelvinDoes Bad Things GuyGumboDrawing JeffyMr. MagooCookie Monster
One-Time characters Dark Matter in my ShortsChef LuigiThe CrocodileElectrician's SonJoseph's GirlfriendRemySheila PerkinsPopeyeD-Money SeniorThe Cat In The HatDoofy's Ex-WifeBirdoBully Bill's DadPolly The ParrotKidnapperKatyJoseph's DadMr. BonesFeebeeJeff The KillerKiller ClownOther Killer ClownChazJunior JuniorStephen HawkingPee Pee SuckWormyNancy JeffyEaster Bunny GenieRussian SpyPiggieGreen Bean GiantPoofGreg the PigDewey DonediditCatherine CatfishBungholeShelbyKool-Aid ManBearyRichard GoodmanSharkyBabiesBig BwahBoofy the MooseChester the ChickenMore...
Classic Characters Big RedKung PowBaby PeachThe RatTyreeseTaco Bell ChihuahuaMama LuigiSpeedyPimpster GoombaSkittlesShrek JuniorTalibanBlueChadKing PigRay the pigHelmet PigYoshiCeciliaKing StrongbottomTannerKoopa TroopaAtsoBrown ElephantLazlo
Cast Logan ThirtyacreLovell StantonLance ThirtyacreChris NethertonChilly JimenezElaina KeyesTito JimenezJulian JimenezDonald RodriguezRebecca
[How does it work?]


Do you like Jeff

The poll was created at 01:35 on December 11, 2016, and so far 118 people voted.
Community content is available under CC-BY-SA unless otherwise noted.