A type of hard, brittle toffee, often containing nuts. Frequently with modifying word, as "butter brickle", "peanut brickle", etc.
Early 20th century; earliest use found in Kokomo (Indiana) Daily Tribune. Apparently from brickle.
Liable to break easily; fragile, brittle; crisp. In later use English regionaland North American regional. Compare "brockle", bruckle .
Old English (in an earlier sense). From a variant (with i-mutation) of the Germanic base of bruckle; in later use probably reinforced by association with break and also with (etymologically unrelated) brittle.