Make sure the post is 'square' to the floor. [=make sure that there is a right angle where the post and the floor meet]
I'll go on the trip if I can 'square it with' my parents. [=if my parents will agree to let me go]
Here's the rest of the money. Now we're 'square'. [=now we don't owe each other anything]
(..) Right shoulder. Your left shoulder. Port. Order. Your right shoulder. Square these weapons away. My Corps' arms should be parallel to the.... The deadliest weapon in the world... ...is a Marine and his rifle. It is your killer instinct (..)1987 Full Metal Jacket
(..) Sir, yes, sir. Bullshit. I still can't hear you. Sound off like you've got a pair. Sir, yes, sir. That's enough. Get on your feet. Pyle, you had best square your ass away and start shitting me Tiffany cuff links... ...or I will definitely fuck you up. Sir, yes, sir. Left, right, left, right (..)1987 Full Metal Jacket