The "Have Maracas, Will Travel" line
In a scene a very buxom young woman wearing one of those 1950s bullet bras walks out of a talent agency, the owner watches her leave and says "Have maracas, will travel."
This is interesting to me because Richard Boone is in this movie which was released three years before Have Gun, Will Travel.
Clearly the Have _______, Will Travel phrase was in existence before Have Gun, Will Travel cemented it in American pop culture catchphrases. I have read that it comes from the line "Have tux, will travel" found in theater advertising. Have Tux, Will Travel is also the name of Bob Hope's autobiography published in 1954.