{v. phr.}, {informal} To go through danger, or trouble. * /John is ready to go through hell and high water to help his chum./ * /The soldiers went through hell and high water to capture the fort./ Compare: COME HELL OR HIGH WATER, THROUGH THE MILL.
GO THROUGH HELL AND HIGH WATER
Meaning of GO THROUGH HELL AND HIGH WATER in English
Dictionary of English idioms . Словарь английских идиом. 2012