Emily Dickinson Lexicon

FLIM'SY, a. [s as z. W. llymsi, having a fickle motion; llymu, to make sharp, quick, pungent. Owen. But Lluyd renders llymsi, vain, weak. The word is retained by the common people in New England in limsy, weak, limber, easily bending. See Class Lm, No. 2, 5, 6.]

1. Weak; feeble; slight; vain; without strength or solid substance; as, a flimsy pretext; a flimsy excuse; flimsy objections.
2. Without strength or force; spiritless. Proud of a vast extent of flimsy lines. Pope
3. Thin; of loose texture; as, flimsy cloth or stuff. [Little used.]