Literally 'ax qing dynasty'. Fu means axe, Manchu is shorthand for the Qing dynasty that ruled China before rabid nationalists took over on 11 Oct 1911. Thus, fu manchu is like saying 'cut off your pigtails' because queues (stupid pigtail things) were the symbol of the Qing's authority in their rule, all China dudes had to wear them as a subordinate thing. So, its very political, its an expression of dissent even. Hate-fuelled Qing hatred.
"Come here you stupid Manchurian i'm gonna ax your queues"
by Lawson August 25, 2005
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The mustache-like residue left around the mouth when licking out the last precious bit of Nutella from the jar.
Look, Jimmy forgot to wipe off his Nu Manchu after polishing off the jar of Nutella.
by yakmeat March 10, 2011
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When you give a girl a facial and most of the seed stays around her mouth and nose area resembling a Fu-Manchu mustache/goatee.
I was messing with Sally last night and I gave her a "Gu-Manchu"

That's a pretty nasty "Gu-Manchu" Steve is sporting.
by squ1rr31_ July 12, 2009
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A sloppy fart where poo drips down both your butt cheeks and forms the shape of the traditional, iconic mustache.
Jenny had to jump into the shower to clean the embarrassing remnants of the fu manchu she had let slip earlier that day.
by nol e. owns October 15, 2009
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Someone who never gives a fuck about any fucking thing happening in this fucking world; a very sweet and handsome young man
by Candy Woman April 11, 2022
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The result of a dodgy Chinese takeaway, normally felt the morning after.
Usually follows a series of Phew Manchus ( post Chinese love puffs).
That's the last time I go to Flaming Eye , this morning I was attacked by poo Manchu.
by Hwun Hung Low February 17, 2023
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when a woman has a bearded asshole strongly resembling the mustache and goatee of a chinese wiseman.
yo I was just about to eat her asshole when I was stared in the face by her poo manchu
by jman31 February 22, 2009
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