bulbus

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."

Ryan-"Okay."