When you get done giving the 'ole bone to the beaver and you forget to wipe off the excess juices so they crusty and next time you get a boner, the crust snaps off and looks like dust
Kid: "Is someone in this room smoking?"
Me: "No, that's just my bonerdust from this morning... sorry bro!"
girls pants worn by guys(emo kids). given the name for being so tight that it is clearly visable of when the emo kid has a boner. There for they are bonerpants
Ben: haha your wearing bonerpants
Justin: No, im being emo for halloween
Ben: yah but there bonerpants
Justin: well at least im not wearing a bra