What is Bona Waviata?

Legal Definition
In English law. Waived goods; goods stolen and waived, that is, thrown away by the thief in his flight, for fear of being apprehended, or to facilitate his escape; and which go to the sovereign. 5 Coke, 109b; 1 Bl. Comm. 296.
-- Black's Law Dictionary
Legal Definition
Goods waived or thrown away by a thief, in his flight, for fear of being apprehended.
-- Bouviers Law Dictionary
Legal Definition
Goods abandoned by a thief in escaping.
-- Ballentine's Law Dictionary