Oh, sure. I feed my cat some every day. He loves the stuff. It's
actually better than milk or half-and-half because it's very very low on
lactose, which a lot of cats can't handle. (I gave Leo some milk once;
he liked it, but not the diarrhea he got from it.) I don't even bother
to whip it--I just pour it straight from the carton into a saucer.

Mine goes nuts over olives and likes to lick sliced tomatoes.

Adult cats are more prone to lactose intolerance than humans are;
whipped cream has a fair amount of lactose in it (if it's real whipped
cream, and not Cool Whip, etc.)

Watch for gas and diarrhea; those are the signs of lactose intolerance.

Keeping the whipped cream to as little as possible is a good idea in
general.

Treats made for cats (Pounce, etc.) are far better for them than rich
human food which is outside their 'normal' diet.