Killer Rabbit Slippers
Beware ye who enter the the Cave of Caerbannog without backup in the form of cozy, yet stylish, footwear. Officially licensed by Monty Python--with a snarl-and-sap of approval from the Killer Rabbit himself--these snaggletoothed homicidal bunny slippers have a vicious streak a mile wide and a plush belly 98.6 degrees warm.
One size fits most, up to US men's size 12, and intimidates all. However, although the Killer Rabbit himself is not as cuddly or harmless as he appears, my sources tell me the Killer Rabbit slippers are tame, friendly, and housebroken. So feel free to wrap them up for children and people you don't want to see decapitated.
On the flip side, if you're looking for the perfect gift for someone you do not like, might I suggest this glove, a strategically placed humiliating magnetic bumper sticker, or an authentic, steaming pile of poo.