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1.
1. Thouroughly, vigorously, and violently.

2. From one end of the earth to the other.
Forest Gump ran from hell to breakfast.
by Light Joker June 17, 2004
 
2.
Farmer's phrase referring to the hours they were out early (sunrise) working in the fields before breakfast.

The time spent working , often in unpleasant conditions, before breakfast. If the work was easy or pleasant, there would be no need for hell reference.
I plowed the new potato field from hell to breakfast.

I worked on the project from hell to breakfast.

I have the hell to breakfast schedule.
by MrPeabody October 25, 2007