Marmaduke is going to murder a squirrel for disrespecting him, just as soon as he can figure out how to climb a tree.

Marmaduke wants to challange the dogcatcher to a duel.

Marmaduke stole a trophy, and also a tennis racket.

Marmaduke convinced his city council via threats, intimidation, and being humongous to honor him with his own street.

Marmaduke may or may not have just gotten a tattoo. This upsets his owner-couple, who consider themselves to be extremely straitlaced (despite the fact that they apparently enjoy dry-humping in front of tattoo parlors in broad daylight).