犯傻

fànshǎ
  1. to do something stupid
  2. to pretend not to know
  3. to stare blankly

CEDICT

  1. (colloquial) to act foolishly; to do a foolish thing
  2. (colloquial) to be in a daze; to stare blankly
  3. (colloquial) to pretend to be naive, ignorant, or stupid
  4. to act foolishly; to do a foolish thing
  5. to be in a daze; to stare blankly
  6. to pretend to be naive, ignorant, or stupid

Wiktionary

Entry Composition

1 犯 fàn
  1. to violate
  2. to offend
  3. to assault
  4. criminal
  5. crime
  6. to make a mistake
  7. recurrence (of mistake or sth bad)
2 傻 shǎ foolish

Related entries

放著明白裝糊塗 fàngzhemíngbaizhuānghútu to pretend not to know (idiom)
愣神兒 lèngshénr
  1. to stare blankly
  2. to be in a daze
發呆 fādāi
  1. to stare blankly
  2. to be stunned
  3. to be lost in thought
望着天花板发呆,还不如读一读小说。

You might as well read a novel instead of staring at the ceiling.

Source: Tatoeba

直瞪瞪 zhídèngdèng to stare blankly
眼睜睜 yǎnzhēngzhēng
  1. to stare blankly
  2. to look on helplessly
  3. to look on unfeelingly
你以為我會眼睜睜地看著你去送死？我會閉上眼睛的。

Do you really think that I will simply watch you walk into trouble? I'd close my eyes.

Source: Tatoeba

睖 lèng
  1. to stare blankly
  2. to glare
愣 lèng
  1. to look distracted
  2. to stare blankly
  3. distracted
  4. blank
  5. (coll.) unexpectedly
  6. rash
  7. rashly
看呆 kàndāi
  1. to gape at
  2. to stare blankly
  3. to stare in rapture
  4. to stare in awe
發懵 fāměng
  1. to feel dizzy
  2. to be confused
  3. to be at a loss
  4. to stare blankly
  5. Taiwan pr. fāméng