The wrong conclusion that just because someone is a dick, they must also be wrong.
I know he's a dick, but that doesn't mean he's wrong. That's a phallusy fallacy.
When a man wrongly believes that his penis is much larger than is actually is, he is living.
I was with this guy last night who listed "well endowed" on his Tinder profile. Maybe if he was comparing it to his pinkie finger. Girl, that dude is experiencing a phallusy fallacy.