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term for a type of snowboarding jib that slants upward to a flat part and then slants downward again. exellent for showing off your skills.
"Dude, I totally nailed my backside 540 on that up flat down box."
7👍 2👎
When a bubbly liquid, like soda, goes flat
"I hate buying 2L bottles of coke, they always flat up quickly"
A combination a “straight up” and “flat out”. It’s more powerful.