Heading into work to find that it was actually worthless you turning up, through fault of your workplace, to the point that you could have easily stayed in bed.
This is usually instituted by managers who do not give a courtesy call to those members of staff who are affected by the situation leading to the individual not being needed at work. Or, by managers who insist on their staff being at work, even when no work can physically be done.
Sam: I went into work at 7am as normal, only to find that the office had burned down and nobody had told me.
Dave: That's a serious WERLI, dude.
Dave: I got WERLI'd today. I was twiddling my thumbs at work from 8am until 1pm today; none of the computers were working; the phones were down and the company refused to send anyone home.