[ばか(P);バカ, baka (P); baka] (n) (1) fool; idiot; (2) trivial matter; folly; absurdity; (adj-na) (3) foolish; stupid; dull; absurd; ridiculous; (n) (4) (abbr) (See 馬鹿貝) surf clam; (P) #10495
[おそい, osoi] (adj-i) (1) (遅い, 鈍い only) slow; (2) late (e.g. "late at night"); (3) (遅い, 鈍い only) too late; (4) (遅い, 鈍い only) (arch) dull; stupid; (P) #11196
[むち, muchi] (adj-na, n) ignorance; innocence; stupidity; (P) #16523
[ぐ, gu] (n, adj-na) (1) foolishness; silliness; stupidity; folly; (2) (arch) (hum) I; me; (P) #17420
[しようもない(しようも無い;仕様もない;仕様も無い);しょうもない(しょうも無い;仕様もない;仕様も無い), shiyoumonai ( shiyoumo nai ; shiyou monai ; shiyou mo nai ); shoumonai ( shoumo nai] (exp, adj-i) (1) (uk) (See 仕様が無い) useless; stupid; good-for-nothing; (2) having no way to do ...
[suttokodokkoi] (n, adj-na) idiot; fool; idiocy; stupidity
[toroi] (adj-i) slow (slightly pejorative); dull; stupid
[torokusai ; toro kusai] (adj-i) (derog) (See とろい) dull; slow; stupid
[paa] (n, adj-na) (1) (See じゃん拳) paper (in rock, paper, scissors); (2) disappearing completely; (3) foolishness; stupidity
[a-pa-] (n) (sl) stupid person; dummy; dolt
[zukkoke ; zukkoke] (n, adj-f) (1) not the norm; (2) foolish; (3) stupid
[ハンロンのかみそり, hanron nokamisori] (n) (obsc) (See オッカムの剃刀) Hanlon's razor ("Never attribute to malice that which can be adequately explained by stupidity")
[バカがうつる(バカが移る);ばかがうつる(馬鹿が移る), baka gautsuru ( baka ga utsuru ); bakagautsuru ( baka ga utsuru )] (exp, v5r) (col) to catch 'the stupid' (e.g. from talking to stupid people, watching mindless TV, etc.)
[boketsu to ; boketto] (adv, vs) (See ぼうっと・1) being stupified; doing nothing
[majiboke] (n) (unintentionally comedic) stupidity
[おこのさた, okonosata] (n) stupidity; absurdity; presumption; impertinence
[うぐ, ugu] (adj-na, n) stupid; ignorant
[うかつ, ukatsu] (adj-na) (uk) careless; stupid; thoughtless; heedless; unobservant; inadvertant; incautious
[ぬるい(P);ぬくい(温い), nurui (P); nukui ( nukui )] (adj-i) (1) (温い, 微温い only) (uk) (ぬくい is primarily used in Western Japan) lukewarm; tepid; (2) (ぬるい only) (uk) (See 緩い・ゆるい・1) lenient; (3) (ぬくい only) (uk) (arch) (See 温) slow; stupid; (P)
[くだらない, kudaranai] (adj-i) (uk) good-for-nothing; stupid; trivial; worthless; (P)
[かぐ, kagu] (n) (1) very stupid (person); great fool; (2) (hum) oneself
[あまくち, amakuchi] (adj-na, n, adj-no) (1) sweet flavour; sweet flavor; mildness; (2) flattery; (3) stupidity
[まがぬける, maganukeru] (exp, v1) (See 間抜け) to look stupid; to have a critical lack
[まのび, manobi] (n, vs) slow; stupid
[まぬけ, manuke] (adj-na, n) (uk) stupidity; idiot; dunce; blockhead; (P)
[まぬけづら, manukedura] (n) a foolish or stupid look
[きくにんぎょう, kikuningyou] (n) (1) doll clothed in chrysanthemum flowers and branches; doll made from chrysanthemum flowers; (2) beautiful but stupid girl
[おろか, oroka] (adj-na, n) foolish; stupid; (P)
[おろかしい, orokashii] (adj-i) foolish; stupid
[ぐのこっちょう, gunokocchou] (exp) the height of folly; sheer stupidity
[ぐじゃく, gujaku] (adj-na, n) stupid and weak
[ぐじゅん, gujun] (adj-na) stupid; dumb
[ぐそく, gusoku] (n) (1) (hum) son; (2) (vulg) stupid son
[ぐてい, gutei] (n) (1) (hum) younger brother; (2) (vulg) stupid younger brother
[ぐどん, gudon] (adj-na, n) (sens) stupidity; silliness
[ぐまい, gumai] (adj-na, n) stupid
[ぐれつ, guretsu] (adj-na, n) foolishness; stupidity; silliness
[ぼけ(P);ボケ, boke (P); boke] (n, suf) (1) (uk) idiot; fool; touched in the head (from); out of it (from); space case; (2) (See 漫才, 突っ込み・つっこみ・2) funny man (of a comedy duo); (in comedy) silly or stupid line; (3) Alzheimer's (impol); (P)
[しゅしゅ, shushu] (n, vs) lack of innovation; stupidity
[じょうびたき, joubitaki] (n) Daurian redstart (said by Japanese to be stupid because it is unafraid of people and so easy to catch)
[おおボケ(大ボケ);おおぼけ(大惚け;大呆け), oo boke ( ooboke ); ooboke ( dai boke ; dai boke )] (n) (See 惚け・1) great idiot; fool; (saying) something silly or stupid
[ちどん, chidon] (adj-na, n) dullness; stupidity
[にぶい(P);のろい(P), nibui (P); noroi (P)] (adj-i) (1) (にぶい only) dull (e.g. a knife); blunt; (2) (のろい is usu. in kana) thickheaded; obtuse; stupid; (3) (にぶい only) dull (sound); dim (light); (4) slow; sluggish; inert; lethargic; (5) (のろい only) indulgent (esp. to the opposite sex); doting; (P)
[どんさい, donsai] (n) stupidity; dull person; dullness
[どんくさい;のろくさい, donkusai ; norokusai] (adj-i) slow (opposite of fast); stupid; irritating
[ばかもの, bakamono] (n) (derog) moron; idiot; stupid person
[ばかづら, bakadura] (n) foolish face; stupid look on one's face
[ぶま, buma] (adj-na, n) clumsiness; stupidity; blunder
[ふつつか, futsutsuka] (adj-na, n) rude; inexperienced; stupid; incompetent
[ぼんようぐまい, bonyougumai] (n, adj-na, adj-no) ordinary and ignorant; mediocre and stupid