The act of concealing the content on one's computer monitor or screen through various techniques such as body blocking, screen tilting, or rapid minimizing. This is normally conducted in an open space such as work where the computer moniter faces a high traffic area. An alliteration of defense
Kelsea: Did you see that raunchy video of my sorority party?
Josh: Not yet! I was on screenfense all day at work because there was so many people around.
by fraxinous6356 November 20, 2012

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