Carlos Edwards' late winner gave the Blues a vital 1-0 victory against the play-off chasing Trotters.
Afterwards McCarthy revealed his delight by painting a colourful image.
"I come in here (to face the media) and try and be nice and calm, but I'm elated," he said.
"I've got friends in my office and just went in there and shouted, `You beauty'.
"Then I walked out again and left them with it. My wife told me off for swearing in front of the grandchildren but she's only seven weeks old!
"It was a huge result and a great three points. Teams don't come much more in-form than Bolton.
"To be fair, we've done alright against the form teams - we've struggled against the likes of Barnsley, Peterborough and Bristol City.
"I don't know why that should be, but we've certainly progressed. We've got better and become harder to beat.
"We had a really good first half.
"They had a spell in the second when they got on top, but when we changed our shape and stemmed the tide we deserved to win overall."