doormat
n.— «Average-sized fluke, sometime called “Flatties,” weigh about 2 to 4 pounds, while the aptly named “doormats” (so-called due to their similarity in size to a welcome mat) weigh 8 or more pounds and provide memorable battles for the angler lucky enough to hook them.…Large “door mats” can be quarter-filleted for most recipes or cut into steaks and grilled over charcoal or gas.» —“Fluke” Massachusets Division of Marine Fisheries May 9, 2006. (source: Double-Tongued Dictionary)
Further reading
Paul in Batavia, New York, recommends The Door-to-Door Bookstore (Bookshop|Amazon), a novel by Carston Henn, translated from German by Melody Shaw, which includes a wonderful description of a book with a perfect final paragraph that you nevertheless...
Ty in Nashville, Tennessee, has fond memories of his dad handing him what he called folding money. This term simply refers to bills, rather than coins. Other versions include folding dough, folding stuff, folding matter, folding green, folding...