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Various cartoons and toy lines, especially in the late 1980s and early 1990s, used repulsive slimy creatures and ooze to appeal to kids, ''especially'' boys (hence the trope name pun). Keywords were "gross", "slime" (or if you're British "gunge") and "ooze".

Toys often focused on some gimmick based around some goopy liquid, and most of these franchises had an obsession with the toxic waste theme. That meant lots of villains, and sometimes heroes, based on mutant abilities, bizarre chimeras, and distorted bodies. The ooze often appeared with a brightly unnatural SicklyGreenGlow.

The theme gradually went away when more conventional comic book heroes started getting their own cartoon adaptations.

See also BoysLikeCreepyCritters, which uses the same idea of "gross" being cool to boys.


* ''WesternAnimation/CreepyCrawlers'' was also spawned from a toyline, this time without the stylish look upgrade for the cartoon.
* ''Literature/{{Goosebumps}}'' is not far from that.
* Creator/{{Mattel}}'s line of "Mad Scientist" toys, which included a "Dissect-An-Alien" kit (complete with phosphorescent slime for "Alien Blood') and a "Monster Maker" kit that featured an acid bath that would dissolve the "monster flesh" from their bones.
* ''Doctor Dreadful'' is a toy line first introduced by Creator/{{Tyco}}, currently produced by Umagine. It makes ''candy'' and other treats with slime and other creepy themes.
* The ''Franchise/MastersOfTheUniverse'' villains, the Evil Horde, got an entire playset based around this concept, the Horde Slime Pit. A claw would reach up to ensnare an action hero, and then a dinosaur skull would open its jaw to drop the official "slime," a green semisolid that came in a canister, similar to the Ghostbusters goo.
* ''WesternAnimation/MightyMax'' was created as a toyline specifically to cash on that trend, although its animated version was toned down with a graphic style closer to ''WesternAnimation/BatmanTheAnimatedSeries''.
* Initially, ''Series/MightyMorphinPowerRangers'' cashed that cow too, with many of their adversaries looking like Otto Mann's acid dreams (Rita Repulsa probably took lessons from Rob Zombie himself).
** The villain of [[Film/MightyMorphinPowerRangersThemovie the 90s movie]] is a BlobMonster named Ivan Ooze who invokes this trope in-universe, selling children slime that [[MayContainEvil brainwashes their parents]].
** While the decision to adopt the show in the 90s probably came from this, the original Japanese ''Franchise/SuperSentai'' series has a long history of really bizarre, disgusting monster designs. While the first few shows mostly had thugs in ridiculous costumes, ''Series/DenshiSentaiDenziman'''s Vader Monsters entire gimmick was that they came from a planet where people had entirely different ideas of beauty and ugliness and were made by the designers to be as grotesque as a TV budget would allow. The franchise has never really looked back since.
* The ''WesternAnimation/MutantLeague'' games are a nice example; they even spawned a cartoon that lasted more than one season.
* ''WesternAnimation/TheRealGhostbusters'' got that directly from the movies. Its toy line sold all sorts of ugly ghost creatures that looked closer to extreme mutants than spirits. It also included synthetic "ectoplasm".
* Similarly ''WesternAnimation/SwampThing''; both were kid-washed animated versions of violent comics. The latter succeeded only as a toyline, since only five episodes were made. ''WesternAnimation/ToxicCrusaders'', of ''Film/TheToxicAvenger'' fame, got a slightly better deal with 13 episodes.
* ''Series/TalesFromTheCrypt'' and its animated series were kind of the sophisticated version of that.
* The formula was copy-pasted for the ''WesternAnimation/{{Teenage Mutant Ninja Turtles|1987}}'', which included "ooze" and featured humanoid creatures covered with garbage and insects.
* Green slime was a RunningGag on kids' series ''Series/YouCantDoThatOnTelevision''.
** Ooze in general became an emblem of {{Creator/Nickelodeon}}, and the "main" form for their logo was a splat. Toys they produced pased on this had names like "Gak", "Floam", and "Smud".
* A SpearCounterpart to the class EZ Bake Oven was called "Queasy Bake" and ran with this trope.
* ''WesternAnimation/{{Mixels}}'' has the Glorp Corp, a Mixels tribe that is based around goo and slime. Their figurines use transparent green pieces to invoke their slime.
* The playfield for ''Pinball/ScaredStiff'' is covered with dripping green goo.
* ''Toys/TheTrashPack'' is designed around disgusting creatures and rotten food, dripping with slime and named with synonyms for "gross". This would continue into their successor, ''Toys/TheGrosseryGang''.
* {{Creator/Nickelodeon}} produced the Thingmaker Chill-A-Tron Lab, which was like a cross between Doctor Dreadful and Creepy Crawlers; like Doctor Dreadful, it had a mad scientist theme to it, but, like Creepy Crawlers, you couldn't eat what you made. It worked using ice rather than heat.
* ''Toys/FlushForce'' is a whole toyline of blind-bagged mutant creatures inside toilets, which have water poured into them to break them out.