Английский словарь американских идиом - kill off

{v.} To kill or end completely; destroy. * /The factory dumped poisonous wastes into the river and killed off the fish./ * /The president suggested a new law to Congress but many members of Congress were against the idea and they killed it off./ * /Mother made Nancy practice her dancing an hour every day; Nancy got tired of dancing and that killed off her interest./