A Rabbit Vibrator is a special kind of vibrator, one that features a vibrating (and sometimes also a rotating) shaft (to be used like a penis) along with a small protrusion designed to stimulate the clitoris simultaneously – this bit is sometimes called the Clit Kisser. 

If you're a fan of  "Sex and the City", you saw one of these way back in the show's first year – it looks kind of like a pair of rabbit ears (which is where the name comes from).  Both due its appearance on "Sex and the City" and the dual stimulation it provides, the rabbit vibrator (in various makes and models) is one of the most popular and best-selling vibrators on the market today.

Rabbit vibrators are produced in much the same range of materials and colors as any other vibrators, and are similarly electric, with battery-powered, rechargeable and plug in varieties available.  The designs of the respective protrusions of each are also widely varying, with some aiming for realism while others Some of the newer models are designed with clitoral stimulation as  their major purpose, and thus have a slightly different design, generally featuring small shafts but retaining the overall "bunny ears" configuration that makes rabbit vibrators so distinctive in appearance.

Like most vibrators, the rabbit vibrator has multiple speeds.  Most models will have a separate motor for the vaginal and clitoral stimulators, each of them usually (although not always) tunable to two or three different speeds.  When you first use your rabbit vibrator, half the fun is experimenting with the different combinations of speeds and motions, and the effects they cause when used.

In addition to their designed purpose of vaginal and clitoral stimulation, rabbit vibrators can also be used to provide simultaneous stimulation of the vagina and anus, or the anus and penis.  However, since these are not the intended uses of a rabbit vibrator, it is important to take greater care when using them for these purposes, as some models may lack the necessary flexibility.

As with all sex toys, it is always a good idea to keep your rabbit vibrator clean, and to clean it and remove the batteries (if any) after use.  If using it for both anal and vaginal penetration, it is a good idea to place a condom over each of the vibrator's protrusions prior to use.  If you intend to use your rabbit vibrator both anally and vaginally, it may be worth considering the purchase of two such vibrators, one for each orifice.

The Rabbit vibrator was first invented in Japan, but has conquered most of the world (except for those parts where sex toys are forbidden by law, religion or both).  It is sometimes called a Jack Rabbit vibrator or a Jessica Rabbit vibrator, depending on the manufacturer.  Some makes of rabbit vibrators also call them bunny vibrators, so when looking at various models online, you may wish to try searching under both of these terms.