A shit stain on the underwear usually caused by digging fingers into the ass to scratch out an uncontrolable salty peanut (See salty peanut). Also known as a skid mark.
As she folded the laundry she noticed a large baconstrip in her boyfriend's underwear.
or
He decided to not buy white underwear anymore, because of his baconstrip making problem.
a sudden, intuitiveperception of a new recipe with bacon as an ingredient, usually initiated by hunger and followed by intense need to perceive the scent of bacon.