That thats; unstressed thuhts ; bush boosh means "That is bull $hit." The "bu" is the first twoletters from the word "bull" and the "sh" is the first two letters from the word "$hit" Creating the term, "That's bush." Another way of saying "that's b.s."
"He got an "A" even though he cheated on the test. That's bush."
"That's bush, you didn't even know her."
Guy 1: So I finally got to see Sarahnaked last night.
Guy 2: Nice! How kept are the greens?
Guy 1: Not kept at all, she had That 70's Bush.
Guy 2: Damn...
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.