wack
n.
"crazy person," 1938, back-formation from wacky. Adjective in slang sense of "worthless, stupid," is attested from late 1990s.
| 词汇 | wack | 
| 词根词缀 | Online Etymology Dictionary wack n. "crazy person," 1938, back-formation from wacky. Adjective in slang sense of "worthless, stupid," is attested from late 1990s. | 
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