Top Definition
when a girl deserves to suck penis for a very long time
"that girl looks like she's falacious."
"You know the girl that came down to my house last night ? She's totally falacious."
by hotone August 04, 2008
1 more definition
Good, like a blow job
Man, that clam bisque was falacious
by J Mo D September 12, 2010

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