English Reference
Idiom idiom

know from a bar of soap


To know; to be acquainted with (a person).

Meaning adapted from Wiktionary, available under CC BY-SA 4.0.


SIMPLE

“I do not know him from a bar of soap.”

CONTEXTUAL

“She claimed to be my cousin, but I did not know her from a bar of soap.”

COMPLEX

“The stranger approached me with such familiarity that I felt confused, as I truly did not know him from a bar of soap.”


Related idioms8entries
  1. 01

    all over bar the shouting

    Of an activity where the result is known, but may be subject to change, due to it not being officially finished or announced.

  2. 02

    as far as one knows

    To the best of one's knowledge, as far as someone knows or possible information to be gathered about the topic, subject, aspect, or situation.

  3. 03

    as you know

    as it is already known.

  4. 04

    bar none

    Without exception; excluding nothing else of the same kind.

  5. 05

    bar sinister

    The state or characteristic of having been born out of wedlock; illegitimacy; bastardy.

  6. 06

    bar star

    A woman who frequents bars or lounges, usually late at night.

  7. 07

    belly up to the bar

    To commit oneself to a challenge or task; to accept a responsibility; to acknowledge a fact.

  8. 08

    Bob Hope

    [Cockney slang]soap

Last updated August 10, 2026