Blatantly palm covering your phone screen, positioning your body so your phone isn't seen or angling your phone screen away from who you'd like not to see it. a suspect move in general but especially when being done to a significant other or partner in a relationship.
"we were layin down last night and she got a snap. but before she opened it, she started raw hidin.."
"he's usually very open with me about his phone but lately he's been screen blockin every time he gets a text.."