nothing could be further from the truth

US /ˈnʌθɪŋ kʊd bi ˈfɜːrðər frəm ðə truθ/
UK /ˈnʌθɪŋ kʊd bi ˈfɜːrðər frəm ðə truθ/
"nothing could be further from the truth" picture
1.

used to emphasize that something is definitely not true

:
Some people think I'm lazy, but nothing could be further from the truth.
He claimed he was innocent, but nothing could be further from the truth.