inside out

Idioms  

1. With the inner surface turned out or revealed, as in He wore his shirt inside out . This expression dates from about 1600 and was soon used figuratively, as in He turned the verses inside out and revealed their hidden sense .

2. Extremely well, thoroughly, especially alluding to knowing something. For example, He knows this system inside out . [First half of 1900s]

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Example Sentences

My brain is busy trying to rearrange what she’s turned inside out.

From Literature

I’m just really humbled and thankful to be a part of a team and staff that cares about things from the inside out.

From Los Angeles Times

Note that this week’s letter was authored by Mr. Homan, who is as serious as a heart attack about border security and who knows DHS inside out.

From The Wall Street Journal

Shame and outrage scalded me from the inside out.

From Literature

Teachers must also shoulder emotional labor in addition to knowing their subject, whether it’s history, math or English, inside out.

From MarketWatch