lightweight:
(plural: ‘lightweights‘; pronunciation: the letters ‘i’ in ‘light’ and ‘weight’ rhyme with the word “eye”)

lightweights in boxing
a boxer weighing between 126 and 135 pounds in a boxing sport;
a person (or a thing) of less than average weight;
a person of very little cleverness, ability, importance, etc. (an unimportant person), but rude or show-off,

a lightweight & a heavyweight in business
Jimmy is the best lightweight in our body-building team that is selected to represent our country in the international body-building competition in Hungary.
The boxing club manager is confident that his lightweights are just as good as any lightweights from any other club in the country.
Never mind his bragging; he is a lightweight in our organisation.
As a result of global recession, some international IT heavyweights are gradually becoming lightweights, and, according to some financial experts, some may go off the charts by the time the global financial situation improves.
Note 2: ‘lightweight’ is also used in computer technology for certain programs. For an article that explains what a lightweight in computer software is, please click here.
