заре́з

noun, masculine, inanimate

Very rarely used word (top 40,000)

1.
cut, gash, throat cut
Example:
На шее овцы был виден глубокий зарез.
A deep gash was visible on the sheep's neck.
2.
slaughter, killing (by cutting the throat)
Example:
Зарез скота производился на ферме.
The slaughter of livestock took place on the farm.
3.
ruin, disaster, major loss, catastrophe, something ruinous
Example:
Этот контракт был для нас полным зарезом.
This contract was a complete disaster for us.

Examples

Мне бы́ло до заре́зу скучно.I was incredibly bored.