lightweight

IPA: ɫˈaɪtwˈeɪt

(combat sports) A particular weight class, or member of such, as prescribed by the rules, between that of the heavier welterweight and the lighter featherweight. See Wikipedia for the specifics of each sport.
(rowing) A particular weight category as prescribed by the rules, separate from an open or heavyweight class.
(weightlifting) A competitive weight division as prescribed by the rules, between the heavier middleweight and the lighter featherweight.
One of little consequence or ability.
A person who cannot handle their drink; one who gets drunk on very little alcohol.
(by extension) A person with low endurance.
A political candidate with little chance of winning.

Examples of "lightweight" in Sentences

I've written about what I call the lightweight myth.
We have what we call a lightweight tank and a super lightweight tank.
Smart Bear makes CodeCollaborator, which it describes as a lightweight code-review tool.
However, I think calling her an "intellectual lightweight" is actually giving her a leg up.
Paul Begala calling Sarah Palin an "intellectual lightweight" is the pot calling the kettle black.
Maybe the next Rovers should have a thin lightweight lead shield protecting their circuit boards if they do not already.
Calling her an "intellectual lightweight" is generous because it implies some level of intellect in the political arena.
Embarrassingly amateurish, he gives new meaning to the term lightweight, and it has nothing to do with his character's ability to float on air.
This wall-mounted fireplace made in lightweight aluminum, the Cupola is available in a black or white matte finish can be a stylish piece for your decor.