Also known as dingleberry or assbugar. A small rolled up ball of toilet paper stuck or tangled in the hair of the butt crack. Alternatively it can be the dried up remains of a sexual encounter left in the pubic hair as a result of bad hygiene.
Any Welsh bloke that has a thing for Jammy Dodgers and Doctor Who. A Whisker Biscuit will be your saving grace in a time of moldy biscuits or any such analogy.