# know from a bar of soap

idiom

Source: https://englishreference.com/idiom/know-from-a-bar-of-soap
Updated: 2026-08-10

## Meaning

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

## Examples

- I do not know him from a bar of soap.
- She claimed to be my cousin, but I did not know her from a bar of soap.
- The stranger approached me with such familiarity that I felt confused, as I truly did not know him from a bar of soap.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.