Wasting time, energy or money, scrolling aimlessly through frivolous content on social media, websites or video sharing sites. Could also be loosely be referred to as Idle Scrolling, which is spending time doing nothing, albeit one is scrolling, they are scrolling without purpose, aim or goal.
The concept is also applied to wasting time through other means, see Fritter Lifing.
I was fritter scrolling and didn't realise how much time had past.