Princeton's WordNet

1. flaky, flakey(adj)

   made of or resembling flakes

   "flaky soap"

2. flaky, flakey(adj)

   made of or easily forming flakes

3. bizarre, eccentric, freakish, freaky, flaky, flakey, gonzo, off-the-wall, outlandish, outre(adj)

   conspicuously or grossly unconventional or unusual

   "restaurants of bizarre design--one like a hat, another like a rabbit"; "famed for his eccentric spelling"; "a freakish combination of styles"; "his off-the-wall antics"; "the outlandish clothes of teenagers"; "outre and affected stage antics"

Wiktionary

1. flaky(Adjective)

   Consisting of flakes or of small, loose masses; lying, or cleaving off, in flakes or layers; flakelike.

2. flaky(Adjective)

   Unreliable; prone to make plans with others but then abandon those plans.

   Some of his friends were flaky.

3. flaky(Adjective)

   Unreliable; working only on an intermittent basis; prone to cease functioning properly.

4. flaky(Adjective)

   eccentric; scatterbrained

Origin: flake + -y

Webster Dictionary

1. Flaky(adj)

   consisting of flakes or of small, loose masses; lying, or cleaving off, in flakes or layers; flakelike

The New Hacker's Dictionary

1. flaky

   (var sp. flakey) Subject to frequent lossage. This use is of course related to the common slang use of the word to describe a person as eccentric, crazy, or just unreliable. A system that is flaky is working, sort of — enough that you are tempted to try to use it — but fails frequently enough that the odds in favor of finishing what you start are low. Commonwealth hackish prefers dodgy or wonky.

• skilferig; vlokkerigAfrikaans
• نَدْفي، قِشْريArabic
• люспестBulgarian
• escamosoPortuguese (BR)
• vločkovitýCzech
• flockigGerman
• flaget; skrøbeligDanish
• που είναι σε φλούδεςGreek
• desconchadoSpanish
• helbelineEstonian
• پوسته پوستهFarsi
• hilseileväFinnish
• floconneuxFrench
• עָשוּי פְּתִיתִיםHebrew
• परतदारHindi
• ljuskav, ljuštavCroatian
• pelyhes, pikkelyesHungarian
• berkeping-kepingIndonesian
• flögóttur; sem flagnar auðveldlegaIcelandic
• a falde, a scaglieItalian
• 薄片のJapanese
• 얇은 조각의Korean
• apsilupęs, nušerpetojęsLithuanian
• plēkšņains; kārtainsLatvian
• berkelupasMalay
• schilferachtigDutch
• som flasser av/faller av i flakNorwegian
• puszysty, płatkowatyPolish
• پوسته پوستهPersian
• پتری پتریPashto
• escamosoPortuguese
• ca un fulg, ca fulgiiRomanian
• слоистыйRussian
• vločkovitýSlovak
• kosmičastSlovenian
• pahuljastSerbian
• flagig, fjällig, flingliknandeSwedish
• ที่แตกเป็นแผ่นThai
• ince tabaka halindeTurkish
• 薄片狀的Chinese (Trad.)
• схожий на пластівціUkrainian
• پرے جیساUrdu
• có bông (như) tuyết; dễ bong ra từng mảngVietnamese
• 薄片状的Chinese (Simp.)