flyweight

kärpässarjalainen puhekieltä a weight that moves outward depending on centrifugal force.
A weight class in many combat sport|combat sports; e.g. in professional boxing of a maximum of 112 pounds or 50.8 kilograms.
puhekieltä small, light or unimportant
2010, Roger Ebert, http://rogerebert.suntimes.com/apps/pbcs.dll/article?AID=/20100525/REVIEWS/100529986 Sex and the City 2:

The characters of "Sex and the City 2" are flyweight bubbleheads living in a world which rarely requires three sentences in a row.