Ooohh...were to start....

Tubby
Tubby
The Tubster
Tubby Wubby
Fats
Big Boy
Good Boy
Tubs
Black Panther
Momma's Boy
Bumper
Big Meanie (when he's picking on Peanut)
Garage Kitty
Garage Rat
The Bapper

Peanut
Peanut
Snotty Little Girl
Snots
Muffin Head
Peach Pie
Chocolate Chip Cookie (note, all food names given by Terry)
Flatso (she gets so flat when she's sleeping on the couch, see picture)
Peanut Weanut
Little Girl
Daddy's Little Girl
Beggar
Professional Beggar
The Fluffster
Little Toe-in Kitty
Little Goofer
Wet Head (when she's drinking out of the running faucet)
Wet Paws
Scaredy Cat

And many many more that Terry comes up with at the spur of the moment.

The most common for both of them is Snots as in "Where are the Snots?" "Are the Snots helping you?" "What are them Snots up to now?"

Here's Peanut in her Flatso mode.


Good topic! It's fun reading everybody's nicknames. Oh, and amazingly Tubby comes to them all - including Peanut's names, and Peanut comes to none of them!