The Grim Adventures of Billy and Mandy
Season 1, Episode 3: Opposite Day
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Billy and Mandy tell Grim it is "Opposite Day" and that, when they say something, they really mean the opposite. Due to his difficulty understanding the concept of Opposite Day, Grim has to do Mandy's chores. Finally, Grim thinks he understands when Billy and Mandy say they "want" pie, meaning they "do not want" pie. However, Mandy then says that when she said it was Opposite Day, it really was not.
All Episodes - Season 1
Episode 1
Meet the Reaper
Episode 2
Skeletons in the Water Closet
Episode 3
Opposite Day
Episode 4
Look Alive!
Episode 5
Mortal Dilemma
Episode 6
Get Out of My Head!
Episode 7
Fiend Is Like Friend Without the 'R'
Episode 8
Recipe for Disaster
Episode 9
A Dumb Wish
Episode 10
Grim vs. Mom
Episode 11
Tastes Like Chicken
Episode 12
Grim or Gregory?
Episode 13
Something Stupid This Way Comes
Episode 14
A Grim Surprise
Episode 15
Beasts and Barbarians
Episode 16
Hoss Delgado: Spectral Exterminator
Episode 17
To Eris Human
Episode 18
Billy's Growth Spurt
Episode 19
Billy & the Bully
Episode 20
Big Trouble in Billy's Basement
Episode 21
Tickle Me Mandy
Episode 22
Little Rock of Horrors
Episode 23
Dream a Little Dream