most likely it means that a pitch is up in the strikezone (around the letters of the jersey of the batter) or low in the strikezone (around the knees of the batter).
(john here) I don't know why but major league umpires tend to call a lot of pitches high when they are actually still in the upper part of the strike zone.
It also refers to short "at bats" as in three up, three down.
its like 6 up 6 down
No, Up does not mean down. In fact, "down" is the antonym of "up"!
I think you mean slow down and speed up. slow down =slow, speed up=fast
Yes. Vertical means up (or down).
down, down, down, up, down ,up
You really should describe more about what you mean they are "bouncing up and down"
If your face is down and your butt is up, then you're lying down on your face.
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The term vertical refers to up and down.
They are sizing you up.
straight up and down
up