Difference between “inside and out” and “inside out”

inside and out—in every part; throughout:

• We searched the house inside and out for the kitten.

inside out—

1. so that the inside is turned outside:

• Mother turns the stockings inside out when she washes them.

2. know smth. extremely well:

• Duane has worked on numerous Toyotas so knows them inside out.

See also: in and out / ins and outs.