oh, goodie...I will then....hhhmmmm Lean and rest by definition:
I would have to say is the postions one takes while one is beading down on a "T" and trying to get the "T" in the crosshairs....
Lean (against any available stable object)... and rest (relax your body)....blow out all air and ssssslllllooooollly pull the trigger....
or it could be the postion one takes after a really good "O":)....you lean over and rest because you are so relaxed....
Bren