Our Dave gets called all sorts, depending on what he's doing...
Deer Boy, if he is looking like a deer
Corpse, if he is lying stretched out on the floor
Mantis, if he is thrashing about on the floor rubbing his back on the carpet
Contortion Boy, if he is lying in a weird, uncomfortable-looking position
Other than that it's Daver, Davelicious, Big D, nugget, or knucklehead.
Also, any song that's got the word 'baby' in it... the lyrics get changed to 'Davie'...
Take Good Care of my Davie
Ooh, Davie I love your way
Sugar Davie Love
Be My Davie
Bye Bye Davie
I'll Be Your Davie Tonight... you get the picture.