WACKIEST
WACKY
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, wacky, whacky
(adjective) informal or slang terms for mentally irregular; “it used to drive my husband balmy”
goofy, silly, wacky, whacky, zany
(adjective) ludicrous, foolish; “wore a goofy hat”; “a silly idea”; “some wacky plan for selling more books”
Source: WordNet® 3.1
Adjective
wackiest
superlative form of wacky: most wacky
Source: Wiktionary
WACKY
Wack"e, Wack"y, n. Etym: [G. wacke, MHG.wacke a large stone, OHG.
waggo a pebble.] (Geol.)
Definition: A soft, earthy, dark-colored rock or clay derived from the
alteration of basalt.
Source: Webster’s Unabridged Dictionary 1913 Edition