Adjective

(er)

In a disorderly state; chaotic; disorderly.

*{{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= Boundary problems , passage=Economics is a messy discipline: too fluid to be a science, too rigorous to be an art. Perhaps it is fitting that economists’ most-used metric, gross domestic product (GDP), is a tangle too. GDP measures the total value of output in an economic territory.}}

(of a person) Prone to causing mess.

(of a situation) Difficult or unpleasant to deal with.

Adjective

(er)

Heavy; massive.

* 1587, Christopher Marlowe, Tamburlaine the Great

Their plumed helms are wrought with beaten gold, / Their swords enamell'd, and about their necks / Hang massy chains of gold down to the waist;

* 1874 Ralph Waldo Emerson, Heroic

When mountains tremble, those two massy pillars / With horrible convulsion to and fro

* 2003 October 5-8, J. A. Kosinski, 2003 IEEE Symposium on Ultrasonics , volume 1, ISBN 0-7803-7922-5, abstract, pages 70-73

We develop a set of six coupled equations governing the modal amplitudes and phase angles (mode-center offsets) for the flat, piezoelectric plate resonator with massy electrodes of unequal thickness.