Lyric discussion by WTDN? 

Cover art for Sheriff Fatman lyrics by Carter the Unstoppable Sex Machine

The song is about slum landlords and the threatening/violent ways used. Nicholas Van Wotsisface is Nicholas van Hoogstraten a slum landlord who was later imprisoned for manslaughter

"a born again Rachman" Rachmanism: 'Landlords buying up slums to fill with immigrants at extortionate rents; named after Peter Rachman, a notorious racketeering landlord in Notting Hill in the 1950s and 1960s'. (Taken from the english dictionary)