= C =
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!"
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.