a person who buys animal carcasses or slaughters useless livestock for a knackery
or rendering works.
a person who buys and dismembers old houses, ships, etc., to salvage usable parts, selling the rest as scrap.
Dialect. an old, sick, or useless farm animal, especially a horse.
Obsolete. a harness maker; a saddler.
Origin: 1565–75; knack
compare Icelandic hnakkr
nape of the neck, saddle) + -er1
is always a great word to know.
So is doohickey. Does it mean: