A deceptive, misleading, or false notion on the subject of one's penis, usually about size.
Guy 1 - "Yeah my dick was actually too big for her, it was painful. I mean it's probably about 9 inches."

Guy 2 - "Really? Impressive."

Guy 3 (whispers to guy 2) - "God that is such a phallusy."

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Guy - "Heard your boyfriend's penis is green."

Girl - "Phallusy: shut the fuck up."
by AnonymousMouse1 July 4, 2010
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The myth of Moby's Dick. The idea that the elusive sexual satisfaction a woman seeks lies in some mythical penis she searches for like Captain Ahab and the whale.
I spent the first 53 and a half years of my life obsessively chasing Moby’s Dick, a mythical penis that would satisfy me yet always seemed elusive. It’s such a relief to no longer be chasing that particular phallusy.
by a woman seeking June 29, 2020
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Not only are you wrong, but you are being a dock about it.
After hours of debate, and constantly proving the guy wrong, his argument devolved into "You are a Nazi." , after that all he could come up with is phallusy, after phallusy....
by Howard_Anxo October 22, 2017
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A big mistake made by a guy who is a real dick.
My dickhead brother got in a car accident today while texting. What a phallusy
by Metal Timmeh June 29, 2013
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the stories men make up about their love life
When Don bragged about his hot date with Becky, it was a phallusy.
by groovyrad February 3, 2006
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to lie about the size of one's penis
"Andy said he was 9 inches hard. That is SUCH a phallusy."
by TastyTreat March 14, 2003
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An impression, based on a man's false accounts or exaggerations, of his sexual prowess.
Dale's wild ride through Sandals adult resorts gave rise to the phallusy that surrounds him today.
by HandyDictionary March 26, 2010
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