This is the 5350th most frequent French word.
bub
The word "bub" is not a French word. It is informal English, meaning "buddy" or "pal."
Here, 'bub' is used informally as a friendly term of address, similar to 'buddy'.
Salut, bub, comment ça va aujourd'hui ?
Hi, bub, how are you today?
In this context, 'bub' is used to refer to a young child or baby, conveying affection.
C'est un petit bub bien mignon que vous avez là.
That's a cute little bub you have there.
Here, 'bub' is used in a slightly more serious tone as an informal term to engage the listener's attention.