From The Free On-line Dictionary of Computing (19 January 2023):
gweep
/gweep/ To hack, usually at night, or one who does so. At
WPI, from 1977 onward, gweeps could often be found at the
College Computing Center punching cards or crashing the
PDP-10 or, later, the DEC-20. The term has survived the
demise of those technologies, however, and is still alive in
late 1991. "I'm going to go gweep for a while. See you in
the morning." "I gweep from 8 PM till 3 AM during the week."
"Gweep" originated as an onomatopeiac term, evoking the sound
of the (once-ubiquitous) Hazeltine 9000 terminals' bell on
WPI campus.
A gweep is one step above a fweep.
(1995-01-31)