The film
Petty con artists Slicker Smith and Herbie Brown mistakenly join the Army evading the cops. The cop chasing them winds up as their drill instructor. A rich young man and his former working class chauffeur are not only in the same unit, they're vying for a pretty girl who seems attracted to both.
Synopsis from TMDB.
The name
Also in Buck Privates
Elsewhere on screen, Slicker
