to go back on one's word

to trouble oneself with, invest oneself in, take the pain (to do something) / to sacrifice oneself for others

(informal) to give up trying to guess something, e.g. the answer to a riddle

to bet one's boots that, to bet one's bottom dollar that

(figuratively) to turn in one's grave

(Louisiana, Cajun, St. Mary Parish) to be dismissed

to die of old age, to die a natural death / to die out or fade away gradually and naturally

(figuratively) to make a contribution, to contribute one's fair share, to play one's part, to do one's bit

(informal) to never listen to anyone else, to be pig-headed, to do as one pleases

to bet one's boots that, to bet one's bottom dollar that (to be absolutely sure that)