When you're slacking off in an office setting that requires a computer and have a window up for display purposes to simulate work. Often requires Alt+tab to display your Slackground when browsing non-work related content.
For example: Spread Sheets, Important looking emails, Memos, ect.
Oh crap BossRoger just walked by! Good thing I had my Slackground displayed so he did not see the NSFW pictures I was looking at.
A sexual position in which the male( or girl we don't kink shame) quickly changes from vagina to anus, so quickly that they don't realize it at first. Note: Can only be performed on girls
Bro, you have to try the StumperSneakaround on your girl, she would seem to be in to that.