know something inside out
/ˌnəʊ ˌsʌmθɪŋ ˌɪnsaɪd ˈaʊt/NEUTRAL · B2
Meaning
to be familiar with every detail of something
Examples
- 1Ask Priya for directions; she drives a taxi and knows London inside out.
- 2I've played this game every week for years, so I know it inside out.
- 3Our tour guide knew Rome inside out and showed us streets that aren't in any guidebook.
- 4Ask Ben about the new parking rules – he has read them twice and knows them inside out.
- 5Do you know French inside out, or would you still need lessons before the move to Paris?
Grammar
know changes: knows, knew, known. A short object goes between know and inside out: know it inside out. You can also learn or understand something inside out.
More idioms about education
All 20 idioms and the topic quiz →take something on boardto understand and accept an idea or advicedraw a blankto fail to remember something or find an answera school of thoughta set of ideas or beliefs shared by a group of peoplein a class of your ownmuch better than everyone else at somethingput your thinking cap onto concentrate hard on how to solve a problemplay truantto stay away from school without permission
English Idioms400 idioms in 20 topics — with reviews that keep them from fading
Here you get a couple of questions. The app gives you 16 practice modes, native equivalents and spaced repetition that tells you when it’s time to refresh.
