know inside and out
Master every detail
To know something inside and out is to understand it thoroughly, with complete familiarity in every detail.
The phrase suggests knowledge so comprehensive that you could navigate the subject from any angle—as if you knew both its interior workings and exterior form.
She knows that software inside and out.
After twenty years in the business, he knows the industry inside and out.
- in and outBriefly present then absent
- ins and outsThorough knowledge of details
- chapter and verseExact documented source details
- coreCentral essential portion
- mapSpatial representation of terrain
specialist · subject matter expert · troubleshooting · grasp · pattern recognition · expertise · intuition · immersion · learn the ropes · hands-on experience · problem-solving · understanding · fluency · second nature · old hat · insight · handle · comprehension
know, knows, known, knowing, knowingly, knowledge, knowledgeable, unknowing, unknowingly