leatherjacket

leatherjacket (LETH-er-jak-it) - n., the tough-skinned larva of certain crane flies (genus Tipula); silvery blue fish (Oligoplites saurus, a species of jack) of eastern Pacific and western Atlantic waters with leathery skin and yellow fins; any of various other fishes having tough skin, including the filefishes and the triggerfishes; any of several Australian trees with very tough, smooth bark (including Barklya syringifolia or golden crown, and Eucalyptus punctata grey gum; (Aus.) a thin pancake made of flour and water, johnnycake.


A bunch of things that are tough on the outside.

---L.