knowing one's arse from one's elbow

Questions

What does knowing one's arse from one's elbow mean?

present participle and gerund of know one's arse from one's elbow

How to pronounce knowing one's arse from one's elbow

1. Open the pronunciation page — Open the Speakur entry for “knowing one's arse from one's elbow”.
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 “knowing one's arse from one's elbow”.
4. Repeat and practice — Say “knowing one's arse from one's elbow” aloud, matching stress and vowels until it feels natural.