noun
prude
PROOD/pruːd/
A person considered excessively modest or easily shocked by sexual matters.
The onlooker seems a prude for objecting to the couple's ordinary kiss.

Etymology
French prude already criticized excessive modesty. It may derive either from a term for a discreet, modest woman or from an adjective praising goodness and virtue—turning approval into criticism of excessive restraint.
In context
I just thought she was a whore slut and you need to wipe everything down. But now she's a pick me prude Pick one, baby You get one. You don't get both.
More examples
- I'm no prude, but that movie has too many sex scenes.
- Being uncomfortable discussing sex does not automatically make someone a prude.
- The comedy pokes fun at prudes who panic over nudity.
Forms
prude · prudes
prudish adjective — Excessively modest or shocked by sexual matters.
prudery noun — Excessive modesty or disapproval concerning sexual matters.