Source : Webster's Revised Unabridged Dictionary (1913)

Leaky \Leak"y\, a. [Compar. {Leakier}; superl. {Leakiest}.]
   1. Permitting water or other fluid to leak in or out; as, a
      leaky roof or cask.

   2. Apt to disclose secrets; tattling; not close. [Colloq.]

Source : WordNet®

leaky
     adj 1: permitting leaks or leakage; "a leaky roof"; "a leaky
            defense system" [ant: {tight}]
     2: (of ships and boats) permitting leakage [syn: {leaking}]
     3: permitting liquids to penetrate; "a tarpaulin too leaky to
        be of much use"
     4: used informally; unable to retain urine
     5: prone to communicate confidential information [syn: {blabbermouthed},
         {talebearing(a)}, {tattling(a)}]
     [also: {leakiest}, {leakier}]

leakier
     See {leaky}