Periscoping

[Britney]

The practice of keeping your phone off or in [flight mode] most of the day to save battery and only turning it on briefly every now and then to check your messages, missed calls, fantasy football points, the football scores etc.
Like a WW2 submarine; coming up periodically to check their position and take on [fresh air] before [going deep] to avoid detection.

[Magaret]

The act of whipping the [dicc] out while fully erect and placing it carefully between [the gut] and the [elastic] of your underwear/assorted leg covering. This aids in either concealing the tiny/enormous size of the male anatomy. Males usually partake in this action while either being embarassed by their size or if they for example are asked to come to the front of the classroom for a presentation at the wrong time.

[Justin Bieber]

When you stand over a kneeling girl, facing the same direction, with your balls draped over her eyes such as would be the viewfinder on a [periscope]. Then she grabs the handle of [the periscope], and aims you toward the intended target. Bonus points if she makes [sonar] ping noises.

[Kai]

The concealing of an [erect penis] by [folding] it behind your [waist] band, leaving the head of your penis exposed underneath your shirt.