A model whose mass-produced pictures see wide appeal as pop culture. Pin-ups are intended for informal display. Pin-up girls are often glamour models, fashion models, and actresses.
These days men can be considered “pin ups” as well.
Modern pin-ups tend to dress in vintage clothing inspired by the pin-ups of the 20s, 30s, 40s, 50s, etc.
Lauren Bacall, Betty Grable, Bettie Page were all pin-ups.
A name for a good looking person, can be male or female. But to be a pin-up you have to be a pretty boy/girl. Used in Farnborough, England alot.
"Alright pin-up how are ya"