池沼

“idiot, blockhead”

Orthographic borrowing from Japanese 池沼(ちしょう) (chishō, “intellectual disabled person”), which is in turn an abbreviated slang of 知的(ちてき) (chiteki) + 障害(しょうがい) (shōgai).

池沼

1. pond; pool

   • 冬天的池沼，
     陰鬱得像一個悲哀的老人——
     佝僂在陰鬱的天幕下的老人。 [MSC, trad.]
     冬天的池沼，
     阴郁得像一个悲哀的老人——
     佝偻在阴郁的天幕下的老人。 [MSC, simp.]

     From: 1940, January 11, Ai Qing (艾青), 《冬天的池沼——給 W.I.》

     Dōngtiān de chízhǎo,
     Yīnyù de xiàng yīge bēi'āi de lǎorén —
     Gōulóu zài yīnyù de tiānmù xià de lǎorén. [Pinyin]

     Winter pond,
     Somber, like a grieved old man—
     An old man bent over beneath the gloom of the sky.

2. (Internet slang, derogatory) idiot; blockhead

• (pond):

• (Tokyo) ちしょー [chìshóó] (Heiban – [0])^[1]
• IPA^(key): [t͡ɕiɕo̞ː]

池(ち)沼(しょう) • (chishō) ^{←ちせう (tiseu)?}

1. pond and swamp

Homophonic kanji for a shortening of 知的障害 (chiteki shōgai).

• IPA^(key): [t͡ɕiɕo̞ː]

池(ち)沼(しょう) • (chishō) 

1. (2channel slang, vulgar, derogatory) intellectual disability person
2. (2channel slang, vulgar, derogatory) insane person