The dried on patty of proteins left on the tip of a penis an hour or so after sexual activity. Often contains lint, hair, or whatever particles were adhered to it before fully drying. Often slightly painful and initially difficult to peel off. May come off more quickly when rehydrated with water.
“Oh man, I just peed on the wall ‘cuz this damn crustle is stuck on ma dick!”
When you funnel an entire 2 liter of Diet Coke into your asshole, Followed by a whole living lobster (no standard procedure exists get creative). Allow these two components sit for an extended period of time, until a danger is presented to you, It is only now that you insert mentos into your anus causing the diet Coke to fizzle rapidly, which will then turn your colon into a makeshift cannon of sorts, furring the lobster at foes at a high velocity.
Stand back sir, or you’ll be forced to face my crustacean colon cannon