drugstore cowboy

noun, Slang.
1.
a young man who loafs around drugstores or on street corners.
2.
a person who dresses like a cowboy but has never worked as one.
Origin
1905-10
Slang definitions & phrases for drugstore cowboy

drugstore cowboy

noun phrase
  1. A young man who frequents public places trying to impress and entice women; a Romeo of the street corners: bell-bottom trousers so much in vogue with the drugstore cowboys (middle-1920s+)
  2. An extra in a western film (Hollywood)

[attributed to the cartoonist and humorist Tad Dorgan, who died in 1929]