\Flag"gy\, a. 1. Weak; flexible; limber. ``Flaggy wings.'' --Spenser. 2. Tasteless; insipid; as, a flaggy apple. [Obs.] --Bacon.
\Flag"gy\, a. [From 5th {Flag}.] Abounding with the plant called flag; as, a flaggy marsh.
Webster's 1913 Dictionary