(historical) A member of the Scottish sect of Cameronians or Reformed Presbyterians.

(Internet slang, nonstandard, eye dialect) What, both in its standard meaning as an interjection, but especially as a response to an outrageous or unexpected statement.

plural of calcisponge

(electronics) Automatic interchanging of connections to a digital meter when polarity is wrong; a minus sign appears ahead of the value on the digital display if the reading is negative.