It was a roaring success.

Meaning

It was extremely successful.

Examples

• John: 'Did the fundraising event meet its target?'<br>
• Alice: 'Yes, <b>it was a roaring success</b>!'
• John: '<b>It was a roaring success</b>; I sold out all my copies!'
• Alice: 'How did your book launch go?'<br>