not every individual with any sort of allegiance to the club will follow 'the Liverpool way' but you'd expect the manager to (I hate the phrase, by the way, but the spirit of the point is worthwhile)
it actually comes from the Indian game of kabaddi. Particularly poor 'raiders' would be insulted with the phrase "he couldn't hit a holy cow's a*** with a sitar" hence "missing [with] a sitar" became, via the British Army, "missing a sitter"