wouldn't know sth if you fell over one/it
also wouldn't know sth if it hit you in the face informalused to say that someone would not recognize something even if it was obvious:
She wouldn't know a bargain if she fell over one!
Thesaurus: synonyms and related words
Unaware
- be in the dark idiom
- be on another planet idiom
- benighted
- blind
- blind spot
- blissful
- fail
- faint
- ignorance is bliss idiom
- ignorant
- ill-informed
- illiterate
- in blissful ignorance idiom
- lost
- unawareness
- unbeknownst
- unconscious
- uneducated
- unfamiliar
- unknowing
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