not know (someone) from a bar of soap

Like this video? Subscribe to our free daily email and get a new idiom video every day!

not know (someone) from a bar of soap

To be completely unaware of or know nothing about someone; to have never met the person indicated. My girlfriend got really excited when a movie star apparently walked past us, but I wouldn't know him from a bar of soap. Someone I wouldn't know from a bar of soap just contacted me online, claiming to be a distant relative.

Common Names:

Name	Pronounced	Usage
Roshni	-	Indian, Marathi, Hindi
Domitianus	-	Ancient Roman
Lamia (1)	-	Arabic
Mahulena	-	Czech
Lieselotte	LEE-ze-law-tə	German
Katarina	kah-tah-REE-nah (German, Swedish)	German, Swedish, Norwegian, Danish, Hungarian, Croatian, Serbian, Slovene