know something inside out

know something inside out {v. phr.}

To be extremely well conversant with something; be an expert in; have thorough knowledge of.

Tom knows the stock market inside out.

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Source: A Dictionary of American Idioms

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inside out

[inside out] {adv.} 1. So that the inside is turned outside. * /Mother turns the stockings inside out when she washes them./ 2. or [inside and out] also [in and […] A Dictionary of American Idioms

inside of

[inside of] {prep.} In; within; on or in an inside part of; not beyond; before the end of. * /There is a broom inside of the closet./ * /There is […] A Dictionary of American Idioms

inside track

[inside track] {n. phr.} 1. The inside, shortest distance around a curved racetrack; the place that is closest to the inside fence. * /A big white horse had the inside […] A Dictionary of American Idioms

within bounds

[within bounds] {adv.} or {adj. phr.} 1. Inside of the boundary lines in a game; on or inside of the playing field. * /You must hit the ball inside the […] A Dictionary of American Idioms

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