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]
(..) I'm gonna drive in with Bee tomorrow morning. Excuse me. There's no smooching in front of me, okay? You're so square. Who even says "smooching"? I tell you, no respect. It's just impossible sometimes. Yeah. I went through that with Bumblebee. (..)2014 Transformers: Age of Extinction