Being of absent mind to the point of not knowing where you are, what you are doing, who you are, or where another party favor is.
"Dude, today is a Yard Sail type of day, I left my wallet in that dirty raver's car and threw up in my own mouth."
"You guys are totally Yardsailed
, I love it, Rave?"
"She is strung out on 10 Zanex, she is a yard Sail"