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the large round shaped head of a penis at the end of the shaft where the urethra is located(also known as mushroom cap, helmet head, or the meat ball)
Eric-"Dude, my shlong is so big, chicks can barely fit the bulbus in their mouth when they are givin me head because my shlong is so big."

Ryan-"Dude thats intense. Your bulbus must be huge. Can i see?"

Eric-"Naw man."

by etrain's-the-man September 28, 2009
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the first name of Bulbus Profundus
the lord of the glands
he's Bulbus Profundus he's the bulbus christ
by bulbus Profundus November 04, 2004
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