Larkin

A term that originated from the popular online video and audio communication app called Discord used to describe a person's inability to go to sleep at night by remaining in the chair of their PC either playing video games or online research .
Usually done alone and occurs around 00:00 to approximately 07:00.

Sleeping through the day is a common side effect of a Larkin.

I wonder why Jim isn't online today, must have pulled a larkin last night.