A Dirty Lysander is the best kind of Lysander. Lysanders should be kept partially covered by dirt, dust or a similarly unclean substance at all times to best emulate their natural habitats.
Alternatively The Dirty Lysander is when you're told to look something up on urban dictionary as part of a joke but it's obscure and doesn't exist but so you decide to make it yourself.
I can't wait to get this pile of mulch home so my Dirty Lysander can roll around in it and then go on urban dictionary and make up definitions about his name.