Why do you accuse and then ask in the next breath, what does the term mean?
First of all, it is NOT racist. it is the colloquial word for a person from Liverpool, England. They may or not support Liverpool, as Everton football club is in Liverpool too. As a by the way, they are also called "Liverpudlians"
When using the term, "scouse" or "Scouser" it is used more facetiously (sarcastically funny) , but not usually in a hostile or derogatory tone.
Of course, you could have enhanced your own general knowledge by looking it up yourself!