... Limax maximus, actually. And although you may not want to meet him, I was delighted to make his* acquaintance a few minutes ago when I took out the scraps to the compost heap. Along with his entourage of minute cream friends, and providing moist protection for a worm, he was resting on the underside of the compost bin lid.
Slugs in general don't interest me much, but I quite like nice big robust species like Max, and I consider his leopard spots quite delightful. He is also called the Great Grey slug or, unsurprisingly, the Leopard slug.
They have been accidentally introduced to many places other than native Europe and are now found in many countries all over the world, so Wiki tells me.
Wikki also tells me that they hang in trees when they mate, and they are the only slug species that do.
And apparently they are also good at learning new things, and have been used in experiments exploring learning behaviour.
* or her. Slugs are hermaphrodites, and have both sex organs.