Any piece of technology created by extra-terrestrials.
Theories say some of the alienware found inside the UFO which crashed in Roswell 1947 was a high-tech propulsion reactor. They say all alienware had been brought to a top secret military base known as Area 51 in Nevada, Texas and been examined there by a special team of scientists.
In that case "yo" is a short form of the possessive pronoun "your".
Fuck yo ass, bitch!
I want all yo money or I gonna kill yo momma.