形容詞 wacky:

1. ludicrous, foolish
   同義詞：cockamamie, cockamamy, goofy, sappy, silly, whacky, zany
2. informal or slang terms for mentally irregular
   同義詞：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

wack.y

adj.（形容詞）
wack.i.er,wack.i.est 【俚語】
Eccentric:
瘋狂的：
例句：
a wacky person.
一個瘋子

Crazy; silly:
瘋的（傻的）：
例句：
a wacky outfit.
傻里傻氣的外套

來源：
Variant of whacky
whacky的變體
probably from the phrase out of whack * see whack
可能源自片語 out of whack *參見 whack

【引伸】
wack.ily
adv.（副詞）
wack.iness
n.（名詞）