Top Definition
Foul smelling faecal matter which either does not flush or will be accompanied by some form of staining of the toilet bowl. Due to their unpleasant after-effects (especially the long lasting, extremely offensive smell) toxic turtles have the effect of dissuading any person from coming too close to the toilet for a considerable amount of time. (hence the reference to "toxic").
John came over to our place on saturday. After dinner, he released a toxic turtle. Everyone was so grossed out that we could not go near the toilet for at least two hours.
by house rules July 06, 2009
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