The term fucker down is used to fuck someone off but in a positive manner, so that the person receiving the sign knows that you mean "fuck you" but as a joke instead of an insult.
When you fucker down someone you flip the person off but the protruding finger must face downwards towards the floor instead of facing upwards, to the sky.
Bro, you're shit at skating and your googen sack reeks, said Tom as he chuckled.
Man, fuck you, replied Tom's friend , Tyron, whiles simultaneously fucker downing Tom, as his hand balled up with nothing but his middle finger protruding downwards, towards the floor.
A bilingual (French/English) phrase with layered meanings, made famous by A$AP Mob in 2012 when a Comme des* Fuckdown hat was worn in their Vice shoot.
Comme des Fuckdown is a brand by streetwear vet Russ Karablin. The design is a re-release of one done with Jamie Story 8-10 years prior for their brand The Cut.
* 'des' because poking fun at Japanese fashion brand Comme des Garçons, not 'de'.
Omiglob, those chicks with the designer purses think they're such hot shit - Comme des Fuckdown