For me it is someone who takes all the "nice stuff" from as many religions and occult practises as possible, molds them into one big pile off "gloop" and says "I am a pagan"; then says everyone else is right as long as they dont have strong views.
A fluffy bunny is likely to cast runes, read horoscopes, turn their money to the moon, ghost hunt, pray to Hindu, Norse, Saxon and Native American gods (plus more), try to meditate to find Nirvana, preach love and peace, burn incense and have no real view about anything but believe that they do. They are likely to buy loads of Llewellyn style books, have a horde of crystals, angel cards, tarot cards, Ogham cards, dream catchers, broomsticks, cauldrons, athemes, bolines, and any other mumbo-jumbo totally unrelated to their last purchase that the local alternative shop sells. They will make pilgrimages to any cultural site (Glastonbury, Avebury, Stonehange, Taj Mahal, anywhere) believing they can "feel the energy man".
Fluffies get really upset when you question them or state fact or have strong faith in any one path. They believe everyone is a "good person" and can't understand it when they find out that isn't true. Fluffies generally dislike reconstructionists and think Wiccans are the next best thing to Tolkien's Elrond and Gandalf, even though they know nothing about recon's and only the first two or three lines of the Wiccan Rede. That doesn't stop a fluffy saying "I'm a Wiccan" though, nor does it stop them saying "I can do the runes" (whatever thats meant to mean!). They like picnics and camping in the woods and everyday is sunshine and bliss in their fantasy world. They will often have flowers in their hair and generally look like 1967/8 never ended.
Overall fluffies are just hippies finding their way or easily lead wimps. They really annoy me.
over 20 years a Recon Norse Heathen