Kay Kaiser said it best with his lyrics:
Guy: I want a zoot suit with a reet pleat
And a drape shape, and a stuff cuff
To look sharp enough to see my Sunday gal.
Gal: You want a reef sleeve with a right stripe
And a rare square, so the gals will stare
When they see you struttin' with your Sunday pal.
Guy: (That's me).
Gal: You wanta look keen so your dream will say
"You don't look like the same beau"
So keen that she'll scream, "Here comes my walkin' rainbow."
etc