To travel with her, she tapped Charles Powell, also tall and virile but only 47, “a smoothy” she called him.
Honest, smoothy, I didn't know you wuz cravin' to be prankin' round wid Ophelia!
a smooth-talking suave male
A person who is attractive, pleasant, and full of finesse: thought of Dr Hugo Barker as a smooth article/ You think you're such a smoothie
[1933+ Students; smoothie is like slicker, but today lacks the connotations of dishonesty and trickiness]