to masturbate.
"Have a good one" being an alias for "Have a good wank", or more precisely "Go f*** yourself".
It seems that some people who are store clerks are embittered by the fact that they are store clerks and seek solace in this ambiguous flippancy.
Synonyms for Have a good one
On this page, you will find 30 slang terms related to Have a good one. Some of the top words include: masterbation, masterbate, peel one off, me-time, Procrasturbating, and 25 more.
