Big furry fuzzy kittens ( or big furry fuzzy kittens with claws) is a phrase said when someone is more then mad. If they say big furry fuzzy kittens with claws, then they are beyond mad and are so upset they have blacked out.
Person 1- telling story or comment making other person mad.

Person 2- you keep it up, I'm going to have Big furry fuzzy kittens with claws.

Person 1- I'm sorry to upset you, then.
by Hankscolts January 11, 2013
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*Jack and john talking about the night before*

john: How did things go with Lauren last night?

Jack: i dont like to kiss and tell but lets just say we went back to hers and i stroked her furry kitten

john: you slick cunt thats my sister.
by LazyToe December 9, 2017
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