This article lists nicknames that characters of the Wallace & Gromit series have been called.
Wallace
The Curse of the Were-Rabbit
Anti Pesto (Wallace and Gromit work together to get rid of pests, they're self employed at this job) it wasn't a nickname for Lady Tott.
Pesto (Victor Quartermaine)
Puddle-Headed Peasent (Victor Quartermaine)
A Matter of Loaf and Death
My little Cheesecake, My Vanilla Slice, My Shortcrust, My Sugar Dumpling, Minced Pie, Utter and Complete Fruit Cake, Gooseberry Fool (Piella)
Gromit
Generally
Lad (Wallace)
Chuck (Wallace)
Old pal (Wallace)
A Matter of Loaf and Death
Stranger (Wallace)
My little Poochy-Woochey, You Meddling Mutt (Piella)
Lady Tottington
The Curse of the Were-Rabbit
My love (Victor Quartermaine)
Totty (Wallace)
Piella Bakewell
A Matter of Loaf and Death
The Bake-O-Lite Girl (Wallace, herself)
Madame, My Fudgecake, My Apple Streudel, Dearest, My Spongecake, My Petal, My Precious, My Flower/Flour, My Angel Cake (Wallace)
Auntie Piella (herself)
Fluffles
Fluffy, Fluffy-Wuffy (Piella)
Lass (Wallace)