In the February 1970 Word Ways, Louis Delpino introduced Specialty Definitions, a hard-to-define activity best illustrated by examples such as SAWTURNE (carpenter's wine) and LOXATIVE (smoked salmon cathartic). This game seems to be popular with a number of authors.
Couvillion, Bernard G.
"More Specialty Definitions,"
Word Ways: Vol. 6
, Article 17.
Available at: http://digitalcommons.butler.edu/wordways/vol6/iss2/17