Meaning of pas si bête in English:

pas si bête

Pronunciation /ˌpɑː siː ˈbɛt/

exclamation

rare
  • Not so foolish; nothing that foolish; not that stupid.

Origin

Mid 19th century; earliest use found in William Thackeray (1811–1863), novelist. From French pas si bête from pas, negative particle, specific use of pas + si so + bête stupid.