"Flex!" - seems to be yelled at a disc that is either going straight or turning right, but the thrower wants it to turn or fade left.
"Hook up!" - same as above
"Turn over!" - seems to be yelled at a disc that is going straight or turning left, but the thrower wants it to turn right
"Flip!" - same as above
"Flippy" - describes a disc that is easy to "turn over"
"Hyzer flip" - I'm most confused about this one. Sometimes used to describe the flight of a disc that comes out of the thrower's hand on a hyzer angle, but then "flips up" to level flight and flies straight. Others have used it to apparently describe the flight of a disc that starts out level but then drops into a hyzer angle, which I'm pretty sure is incorrect use of the term. Others seem to use it to refer to a flight that starts out straight but then turns right. Which, if any, of these is correct?
A flex shot is a "S" curve forced by throwing a stable disc on an anny, I usually will say "flex!" on a shot I accidentally torque over and I need to come out of the unintentional turn. "Turn Over!" is kind of the opposite of this you seem to have most the other down.
Hyzer-Flip and "Flip!" are the same to me. I'll tell my disc to "flip!" when I'm throwing a stable/understable disc with hyzer for a hyzer flip(A shot with hyzer I want to pop flat and fly straight) and it doesn't quite get flat as fast as I want it to.
I'll call for a disc to "Hook up" when it's a really wide swoopy flight path. Either an unintentional "S" curve, Hyzer Flip that "falls off the table" aka looks like its going to ride flat but turns over, or even big swoopy flex shots. Basically I'll use it for shots that look good but never quite "hook up" and fly as straight as I need the to.
I'm always saying something along the lines of those phrases during my shots but it's important to remember don't be the guy yelling at your disc when it's halfway down the fairway, I play with a couple of those guys a few times a week.