From The Jargon File (version 4.4.7, 29 Dec 2003) :
clustergeeking /kluh'st@r?gee`king/, n. [CMU] Spending more time at a computer cluster doing CS homework than most people spend breathing.From The Free On-line Dictionary of Computing (30 December 2018) :
clustergeeking/kluh'st*r-gee"king/ ({CMU ) Spending more time at a computer cluster doing CS homework than most people spend breathing. [{Jargon File] (1994-12-21)