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A word that no one would ever use to refer to a blowjob, and if people do they will most likely not receive one. But society today has to have a "proper word for everything because something like "blow job" is too vulgar.
Fellacio by getfuucked December 9, 2019

fallicious 

to be ultimately wrong, untrue, or unprovable in the most ultimate sense. Illogical. Related to, but not to be confused with fallacious.
Harry: I'm the coolest guy on campus.
Peter: That statement is FALLICIOUS!!!
The act of performing oral sex on a man's penis.
AKA - sucking dick.
I just received falacio from Jessica! That bitch can suck!
falacio by Hookadood January 7, 2007

fallacio 

the extremely slobbery act of and/or the giving of excrutiatingly good oral sensations
Boy 1 - "damn that bitch gives some amazing fallacio"
Boy 2 - "yeah, and so does her mom now i know where she gets it from"
fallacio by tooSHAY September 11, 2007

fallacious 

Function: adjective
1 : embodying a fallacy
2 : tending to deceive or mislead : DELUSIVE
- fal·la·cious·ly adverb
- fal·la·cious·ness noun

(Merriam-Webster)
1 : a fallacious assumption
2 : fallacious testimony
fallacious by Dissipate May 12, 2004
a synonym for a "blow job" meaning oral sex on the male penis. Generally a heterosexual practice, however, also practiced by gays. Very common in prison and somewhat hard to attain from your girlfriend :(
the female unbuttons the males pants, pulls out his reproductive organ, and places her mouth on it, allowing it to enter and exit = fellacio
fellacio by dfas18 February 5, 2009