noun
The definition of a sobriquet is an affectionate nickname.
An example of a sobriquet is a grandfather calling his grandson "pumpkin."
sobriquet

- a nickname
- an assumed name
Origin of sobriquet
French from Middle French soubriquet, chuck under the chin from uncertain or unknown; perhapssobriquet

also sou·bri·quet
noun
- An affectionate or humorous nickname.
- An assumed name.
Origin of sobriquet
French from Old French soubriquet chuck under the chinsobriquet

Noun
(plural sobriquets)
- A familiar name for a person (typically a shortened version of a person's given name).
- "The Bard" is a sobriquet of English playwright William Shakespeare.
Origin
From French sobriquet (“nickname"), from Middle French soubriquet (“a chuck under the chin").