fair and square 

Justly, precisely, or in an honest way and without any doubt.

We won the game fair and square.
She hit me fair and square on the nose.

fair and square by Coell March 15, 2006

stole it fair and square 

1. When you tell the person "hey I'm stealing this (typically an object of no value)" with an undertone of 'and there aint a damn thing you are gonna do about it'.
2. When a person sees you pick up an object and turn and walk away with it and don't say anything about it.

Person one: he said you took his whistle
Person two: yeah but I stole it fair and square man, I told him I was taking it

stole it fair and square by Hrmnypeacelove August 11, 2017