Wack·e Wack·y n.  Geol. A soft, earthy, dark-colored rock or clay derived from the alteration of basalt.
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  wacky
       adj 1: pungent adjectives of disesteem; "gave me a cockamamie
              reason for not going"; "wore a goofy hat"; "a silly
              idea"; "some wacky plan for selling more books" [syn:
              cockamamie, cockamamy, goofy, sappy, silly,
              whacky, zany, unreasonable]
       2: informal or slang terms for mentally irregular; "it used to
          drive my husband balmy" [syn: balmy, barmy, bats, batty,
           bonkers, buggy, cracked, crackers, daft, dotty,
           fruity, haywire, kooky, kookie, loco, loony,
          loopy, nuts, nutty, round the bend, around the
          bend, whacky]
       [also: wackiest, wackier]