Odd question, removing old tag lines from Google Search Results?

I have an issue that I am trying to figure out. My boss had me make him a wordpress site for his surplus store, and funny story, when I told him what the site was for he said he was "A purveyor of shit", meaning he finds random stuff and resells them on the internet, and as a joke in Wordpress when I was making it I made the tag line "Purveyor of shit". I changed it later to "Something for everyone!", but the issue is on Google Search results the actual website shows up towards the bottom of the first page and above it is all different various social media profiles and one website https://registrydb.com/stusurplus.com that in the search results still displays the old "Purveyor of shit" in large letters lol.

So my question is how do I get the actual website stusurplus.com to list first and not show up on the second page search results, and how to get rid of that registrydb listing.

Thanks guys!