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2.
noise made by a happy sleeping cat, making it sound as though the cat is simultaneously snoring and purring
That cat is snurring so loudly; he must be dreaming about catnip.
by xbean8 February 10, 2012
 
1.
A major case of diarhea that might not allow time to find the nearest bathroom. See having the runs spelled backwards.
Victim: "If I don't see a rest stop soon I'm gonna fucking snur my pants."
Friend: "You're going to what?"
Victim: "I think you'll find out soon enough."
by Twat Muncher January 22, 2008