Pappe

Etymology
From (attested 15th century, but earlier the derivative, from the source of modern.

Also compare modern. The original sense of the word was “pap, mush cooked from flour” and “wheatpaste, flour-based glue”. It was then used for a material of book covers made by gluing together several sheets of paper, whence finally “any thick layer of paper” (18th century). The older sense is continued by regional, which see for more.

Noun

 * 1) paperboard, cardboard
 * 2)  blotter acid a piece of paper laced with LSD
 * 1)  blotter acid a piece of paper laced with LSD

Usage notes

 * The distinction between and  is chiefly regional, the latter being preferred in the south, especially in Austria and Switzerland. (In the north,  is used mainly as a countable noun meaning “cardboard box”.) In technical contexts and idiolectally, fine distinctions may be made between both words, but these vary and have little bearing on general usage.