The actual original song lyrics are.
His name is mahrez, and he plays on the wing.
He cuts inside, and you can't do anything,
He'll win a penalty, that we'll probably fucking miss.
But when he scores one, we're going on the piss.
Du Du Du dudu Du Du Du Du Du Du.
I know because I made it up about a week after he skied the penalty at Anfield all those years ago. Sang it sporadically for years all over the place but decided to properly resurrect it at the start of the year and its slowly caught on with some people altering the lyrics.