The Squinting and Crooked strikes server the same purpose: they are defensive cuts that are immediately turned into attacks.
Here are the definitions and images according to Meyer followed by images from other masters:
Schielhauw – Squinting Cut
The Squinting Cut is also a High Cut, but is so named because it is delivered as if with a bit of a squint. It is done thus: Position yourself in the guard of the Day or Wrath (concerning which I have spoken in Chapter 3), with your left foot forward; when he cuts at you, then cut in return, but in the stroke, turn your short edge against his stroke, and strike in at the same time as your opponent, palm away from his sword; step with your right foot well to his left side, and with this, nimbly take your head out of the way. Thus you have executed it correctly against him, and you stand as shown by the large figure on the left in Image G.
Paulus Hector Mair
Sequence by Bill Grandy
This action is far easier than it sounds. The key is to strike with the long edge and at the moment of contact rotate it clockwise to the short edge. If you rotate too soon you won’t have the leverage to stop the oncoming blow at the right place.
If you find that you’ve started this action too late, or if the blow is especially strong, you’ll end up in a neutral bind. When that happens simply abort the rotation and do whatever else seems most appropriate for a bind.
Note: An eariler version of this used a counter-clockwise rotation. That isn’t working for me anymore. I’m not sure why, but at least clockwise matches the picture better.