Stupid
"Stupid" in Japanese
イカす
ikasu
(slang: amazing)
カッコイイ
kakkoī
(slang: amazing)
サイコー
saikō
(slang: amazing)
シブい
shibui
(slang: amazing)
愚か
oroka
(lacking in intelligence)
間抜け
manuke
(lacking in intelligence)
阿呆
aho
(lacking in intelligence)
馬鹿
baka
(lacking in intelligence)
馬鹿げた
bakageta
(lacking in intelligence)
イカす
ikasu
(Extremely)
カッコイイ
kakkoī
(Extremely)
サイコー
saikō
(Extremely)
シブい
shibui
(Extremely)
ダサい
dasai
(Extremely)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.