a blowjob (pronounced like spiffy)
Yo, Nightmare Squad gave that guy a nasty kiffy.
A cat. Or more specifically, a russain cat.
Comes from the root word of kitty, which, in ancient Russain Culture meant the name that all Russain's would call their feline companions. Also refers to a vicious and heartless individual.
"That kiffy tried to attack me"
"My kiffy shits in a box"