One of little consequence or ability.
A political candidate with little chance of winning
A particular weight category as prescribed by the rules, separate from an open or heavyweight class.
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.
A competitive weight division as prescribed by the rules, between the heavier middleweight and the lighter featherweight.
A person who cannot handle their drink; one who gets drunk on very little alcohol.
A person with low endurance.
To reduce the amount or weight of.
Lacking in earnestness, ability, or profundity
Having less than average weight
Lacking in strength
Having a small footprint or performance impact
A small indication of a larger possibility; the first part encountered of a problem that is much bigger than it seems.