knew one's ass from a hole in the ground

Questions

What does knew one's ass from a hole in the ground mean?

simple past of know one's ass from a hole in the ground

How to pronounce knew one's ass from a hole in the ground

1. Open the pronunciation page — Open the Speakur entry for “knew one's ass from a hole in the ground”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “knew one's ass from a hole in the ground”.
4. Repeat and practice — Say “knew one's ass from a hole in the ground” aloud, matching stress and vowels until it feels natural.