圖樣圖森破 [图样图－－]

Jyutping tou4 joeng2 tou4 sam1 po3
Pinyin tú yàng tú sēn pò

Definitions (Wiktionary)

phrase, Mainland-China, humorous, neologism, slang
“too young, too simple, sometimes naive” (used to criticise someone foolish or imprudent, caused by a lack of social experiences)

Jyutping
Pinyin tú yàng tú sēn pò

Definitions (CC-CEDICT)

(Internet slang) to have a simplistic view of sth (transcription of "too young, too simple" – English words spoken by Jiang Zemin 江澤民|江泽民[Jiang1 Ze2 min2] in chastizing Hong Kong reporters in 2000)