lightestweight

Adjective

lightweight (comparative more lightweight or lighterweight, superlative most lightweight or lightestweight)

1. Lacking in earnestness, ability, or profundity.
2. Having less than average weight.
   • […] the Plan incorporates in proper combination every available modern technique, including extensive electrification on the new standard high-voltage a.c. system at a frequency of 50 cycles; main-line diesel traction as a half-way house to electrification; lightweight diesel trains for secondary...1958 January, 'Borderer', “Ten Years of British Railways”, in Railway Magazine, page 15
3. Lacking in strength.
   • With the Gunners far too lightweight in midfield, Mikel Arteta dropped back into a deeper-lying role. This freed Yossi Benayoun to go further forward, a move that helped forge a rare Arsenal chance on 30 minutes when the Israeli released Van Persie, only for the Dutchman's snap-shot to be tipped...2011 September 13, Sam Lyon, “Borussia Dortmund 1 - 1 Arsenal”, in BBC
4. Having a small footprint or performance impact.

See all 13 meanings of lightweight