Top Definition
A challenge that a brave adventurer can partake in where the aim is to not flush their toilet for as long as they can withstand the putrid horror that will eventually build up inside the bowl.
Dinith: "Hello Wendy, by Jove, what is that horrible smell coming from your toilet?"
Wendy: "Well Dinith, I have been taking part in the No Flush Challenge for about 6 years now"
by oh yeah! yeah! February 14, 2014
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