An incredibly muddly wet dog; a dog who has been out in the rain; a dog who has been digging in the yard and is covered with mud; a dripping wet muddy dog with muddy feet staring at you from outside the sliding glass door who wants to come in and get mud all over your house.
"That Mudmoose wants to come in the house!" "That dog's been digging in the yard again...now he's a f...in' mudmoose!" "Don't let that mudmoose in here again, the last time he got mud all over the couch!" "Dry off that mudmoose, then he can come in."