Pygmy
Pygmy was a term used to describe living things of small stature. On Earth, two creatures of small stature that bore the moniker were the pygmy marmoset and pygmy sperm whale. (; )

When Worf was attacked by two Ferengi of short stature from DaiMon Tarr's science team on the surface of Delphi Ardu IV, he called the lot "pygmy cretins!" ()

See also 
 Homunculus
 Shorty
 Tiny

Insults