脳漿炸裂ガール (Nou shou sakuretsu Girl, "Brain Fluid Explosion Girl") is a Vocaloid track by Japanese producer rerulili (Kōhei Sasaki), featuring Hatsune Miku and GUMI on vocals. Originally released on rerulili's self-titled 2012 album, the song quickly became a mainstay of the niconico doujin scene for its frenetic electronic beat, darkly absurd lyrics, and memorable call-and-response structure between the two virtual singers. The music video, animated by ぴちょこ, amplifies the chaotic tone with candy-colored, grotesque imagery. The song entered the maimai series on July 11, 2013, as part of the maimai GreeN launch lineup, initially categorized under VARIETY before later being reassigned to niconico and then niconico & VOCALOID as the game's genre taxonomy evolved. Across the arcade's lifetime, 脳漿炸裂ガール has received both Standard and DX chart revisions, with its Standard Master chart climbing from an initial Level 11 to its present Level 14, reflecting both player skill inflation and the chart's enduring place in the upper-tier repertoire. The DX Master chart, designed by はっぴー (Happy), stands out for its unusually dense Touch-note placement (110 notes), making it a distinct play experience from its Standard counterpart. The Standard Expert chart carries a collaborative credit from 譜面-100号 and はっぴー, originally listed under the pseudonym "合作だよ" ("it's a collab") in older versions of the game. Beyond maimai, 脳漿炸裂ガール has crossed over into sibling Sega rhythm games CHUNITHM and オンゲキ, each with their own chart arrangements, and received a LUNATIC chart in オンゲキ bright MEMORY and an ULTIMA chart in CHUNITHM LUMINOUS. Its lasting popularity in the rhythm-game community owes as much to rerulili's hooky, irreverent songwriting as to the chart designers' creative interpretations across multiple difficulty tiers.