Dictionary

With the inside surface turned to be on the outside.

Example: I now realise that I have my shirt on inside out.

(of knowledge) Thoroughly, extremely well.

Example: I know IBM Assembler Language inside out.

Describes the hitting of a ball that pitched outside of leg stump to the off side of the field.

Example: He hit the ball inside out in an ugly manner, but scored a four.

With the inner and outer surfaces reversed.

Describing cross-court shots made by the unexpected hand, as of a backhand return of a ball struck to the player's forehand.

Directed to the side; sideways.

Example: He cast me a sidelong glance.

Slanting or sloping; oblique.

Indirect; suggestive; not straightforward.

Example: She made some sidelong remarks about his manhood.

Along the side of something.