scratch

This is scratch paper, so go ahead and scribble whatever you want on it.

A scratch company of two innocuous youths and a pacified veteran was therefore what now offered itself to Mrs. Stringham, who rustled in a little breathless and full of the compunction of having had to come alone.

scratch memory

... the shot that does most to make a genuine scratch golfer is the mashie shot up to the pin — not merely up to the green.