Another term for 'Monad', which is a construct borrowed from category theory that is often used in the functional programming language Haskell to represent stateful computation and side effects. The term 'Warm Fuzzy Thing' is promoted by the researcher Simon Peyton Jones because he feels that the term 'Monad' is far too imposing.
You can do IO using the IO warm fuzzy thing." "A warm fuzzy thing is kind of like a burrito, if you think about it hard enough." "The Maybe type class is a warm fuzzy thing