The former Everton talisman has played against the Reds on 23 occasions - more than any other opponent in his career - and came out on the losing side in 10 of those. And Fellaini - who celebrated his 36th birthday on Wednesday - saved his worst for last when he put a steward on his rear in the most recent of those encounters.
Jurgen Klopp's men were flying high at the Premier League peak in December 2018 when they hosted United, who were slumped in sixth at the time. And the Red Devils' hellish form continued with a 3-1 defeat in one of football's biggest rivalries, with Xherdan Shaqiri coming off the bench to seal three points with a timely brace.
United looked desperate during the latter stages of the clash, and that about summed up Fellaini's attempt at the spectacular late on. Sensing an opportunity to haul his side back into the game, the Belgian lined up a half-volley with visions of wheeling away to the corner flag in celebration.
Unfortunately for him, the ball was the only thing that sailed to the corner - and then some as Fellaini's sliced effort didn't come close to troubling goalkeeper Allison. In fact, the only person troubled by his attempt was the unsuspecting steward who was caught on the noggin and fell of their stool.
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The home fans cried out in their thousands at the dismal quality of the attempt but were then given another reason to cheer. And the steward in question appeared to be fine in the aftermath, unless one can count a bruised ego as serious injury.
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Fellaini could only hang his head in embarrassment - and rightly so - as United's trip to Merseyside was summed up in one swing of the right boot. Full of hope and potential but ultimately way wide of the mark; one could even go so far as to say that describes United's general fortunes over the past decade or so.
The most recognisable afro in Premier League history took his leave of England a little more than one month later to join Chinese outfit Shandong Taishan. There's no proof to suggest the sudden exit was because of his steward assault, though it certainly won't have helped.