A young fellow should be ambitious to shine in everything; and, of the two, rather overdo than underdo.
"A Letter Book" by George Saintsbury
Clearly he was underdoing it.
"The Witch Doctor and other Rhodesian Studies" by Frank Worthington
Overdoing in one direction must be compensated by underdoing in another.
"A New Atmosphere" by Gail Hamilton
The English overdo or underdo everything, and are either drunk or in despair.
"Winterslow" by William Hazlitt