We found one dictionary that defines the word sneaky-deaky:

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1. sneaky-deaky: Wiktionary

Definitions from Wiktionary (sneaky-deaky) ▸ adjective:  (slang) sneaky ▸ Words similar to sneaky-deaky ▸ Usage examples for sneaky-deaky ▸ Idioms related to sneaky-deaky ▸ Wikipedia articles (New!) ▸ Popular nouns described by sneaky-deaky ▸ Words that often appear near sneaky-deaky ▸ Rhymes of sneaky-deaky ▸ Invented words related to sneaky-deaky