(n.) A little whiff or puff.

a nobody a nothing breath breath of air capful of wind cipher common man dummy figurehead flatus insignificancy jackstraw lightweight little fellow little guy man of straw mediocrity nebbish nobody nobody one knows nonentity nothing nullity obscurity pip-squeak puff puff of air puff of wind punk runt scrub shrimp small fry small potato small potatoes squirt squit stir of air waft whiff whippersnapper zero zilch