inside-out

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.