Every season of Grossology ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Grossology!

Queen for a Day

The Slim Slime Man

Fartzilla

The Perfect Stink

The Scab Fairy

When Ya Gotta Go

Club Parasites

Go Fish

It's Gotta Be the Shoes

Owl Most Foul

Yack Attack

The Greatest Race Ever Crawled

Kid Rot

The Insider

All Together Now

Oldie but a Goodie

Survival of the Grossest

School's Grossed Out for Summer

Vein Drain

Silent But Deadly, Part 1

Silent But Deadly, Part 2

The King of Rottingham Forest

Lights Out

Frankenbooger

A New Leaf

Heave It or Leave It

Sinister Rivalry

Flushed Away

Vertigo A Go-Go

Sloppy Joe to Go

Hairless Whispers

Stinko

Mold Monster

When Allergies Attack

Pussed Off

Ask the Dust Mites

Turd Wars

Spa Insectiva

Ain't Over Till the Fat Man Sings

Candy Isn't Dandy

Swamp Gas

Squirm

Let Them Eat Fruitcake

New Recruits

Pinkeye & the Brain

Pinkeye's Revenge (Part I)

Pinkeye's Revenge (Part II)

Fangs a Lot

Hirsute Yourself

Pucker Up

The Fart Side of the Moon

Night of the Living Roadkill

Brother and sister Ty and Abby Archer work for the government's Grossology department as they solve crimes and save their world from disgusting supervillains.

The Best Seasons of Grossology

The Best Seasons of Grossology

Season 2

Season 1