cursor dipped in X
n. There are a couple of metaphors in English of the form `pen dipped in X' (perhaps the most common values of X are `acid', `bile', and `vitriol'). These map over neatly to this hackish usage (the cursor being what moves, leaving letters behind, when one is composing on-line). "Talk about a {nastygram}! He must've had his cursor dipped in acid when he wrote that one!"
cuspy
/kuhs'pee/ [WPI: from the DEC abbreviation CUSP, for `Commonly Used System Program', i.e., a utility program used by many people] adj. 1. (of a program) Well-written. 2. Functionally excellent. A program that performs well and interfaces well to users is cuspy. See {rude}. 3. [NYU] Said of an attractive woman, especially one regarded as available. Implies a certain curvaceousness.
cut a tape
vi. To write a software or document distribution on magnetic tape for shipment. Has nothing to do with physically cutting the medium! Early versions of this lexicon claimed that one never analogously speaks of `cutting a disk', but this has since been reported as live usage. Related slang usages are mainstream business's `cut a check', the recording industry's `cut a record', and the military's `cut an order'.
All of these usages reflect physical processes in obsolete recording and duplication technologies. The first stage in manufacturing an old-style vinyl record involved cutting grooves in a stamping die with a precision lathe. More mundanely, the dominant technology for mass duplication of paper documents in pre-photocopying days involved "cutting a stencil", punching away portions of the wax overlay on a silk screen. More directly, paper tape with holes punched in it was an inportant early storage medium.