That thats; unstressed thuhts ; bush boosh means "That is bull $hit." The "bu" is the first two letters from the word "bull" and the "sh" is the first two letters from the word "$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 Sarah naked 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...
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.