Top Definition
A spell that you say to a boggart when you want it to turn into something funny.
When Ron said "Redikulus!" the huge spider nasty feet were suddenly inside of roller skates and it fell flat on the floor.
by harry, harry potter potter November 12, 2007
A way for faggy Harry Potter fangirls and fanboys to write "ridiculous"
"7 Books? That's ridiculous!"
"No. That's Redikulus."
"Go to hell."
by fuckthiseverynameistaken August 21, 2008
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