The act of placing one's penis between to buns and offering it as a meal. Usually leads to some form of oral sex.
Also used in the phrase "I'd like a penis burger with extra penis" to poke fun at fast food chains and their dodgy food.
"I got a burger right here for you baby, A penis burger"
Cashier "Can I take your order please?"
Customer "I'd like a penis burger with extra penis, large fries and a thickshake"
Cashier "We don't have any penis burgers on the menu, sir.
Customer "What kinda place is this? I just want a fucking penis burger with extra penis... is that so fucking hard?"
Boy "I got this penis burger you can have"
*gets out penis burger*