A marshmellow, a really soft person.
dude 1: "Hey look, that guy is chucking a barletta"
guy: *gets poked in the gut and falls to the ground*
dude 2: "What a Effin idiot"
The Barletta effect is when someone drinking from a plastic 2 liter bottle of soda puts their whole mouth over the top of the bottle and they just suck in the liquid so the bottle is overwhelmingly dented. Then they put the cap back on and put it in the refrigerator with the dents still existing.
Omfg Dan, stop smushing my Sprite bottle, nobody likes a Barletta