With the inside surface turned to be on the outside.
I now realise that I have my shirt on inside out.
(of knowledge) Thoroughly, extremely well.
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.
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.
He cast me a sidelong glance.
Slanting or sloping; oblique.
Indirect; suggestive; not straightforward.
She made some sidelong remarks about his manhood.
Along the side of something.