n.
1.profane or obscene expression usually of surprise or anger
2.a commitment to tell the truth (especially in a court of law)
3.a solemn promise, usually invoking a divine witness, regarding your future acts or behavior
Idiom of the Day
head off (something) or head (something) off
to stop something , to prevent something
The company was able to head off a strike by the union at the last minute.