GET TO THE BOTTOM OF (SOMETHING), GET TO THE POINT, GET-UP-AND-GO: American English Idioms #88
GET TO THE BOTTOM OF (SOMETHING) To get to the bottom of something is to understand its origin, cause, or meaning. The phrase has an idiomatic meaning that is difficult to pinpoint due to its various uses. It can imply that one is “digging for” the truth or reasoning behind something; understanding what makes it…