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Adj. a pay off or reward with benifits comprarable to oral sex.

Modern English early 21st century, Coined Andy Lowes

Man, that skateboard trick I just landed was fellacious! That chocolate was better than good, it was fellacious!
by Andy Lowes June 23, 2007
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2
Having the desire to suck up to, or suck on something.

Derived from the term fellatio.
The apple fanboy wrote a fellacious review of the new Macbook Pro.
by edboy May 19, 2006
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3
adj (derived from fellatio) - when something is so good or cool you'd give it head if you could.
Omg! That new phone is so fellacious!

That cake was so fellacious I think I wanna go give my boyfriend head!
by jigahigacityniga May 23, 2009
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4
adj., of convincing your partner that fellatio is delicious, as in "a fellacious argument", cf. noun, fellacity
Dick's fellacious endeavours finally convinced Jane.
by mum61e November 29, 2012
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5
Excellent, to the point of being unbelievably good fellatio (oral sex performed on a man).

Not to be confused with fallacious.
"Ohh, girl! I can't believe how good you are at that; it was straight fellacious!"
by Tommyboy23 December 17, 2013
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