(strictly) vonce

[Mullins, Bill]

The Use of Drugs by Jazz Musicians
Charles Winick
Social Problems > Vol. 7, No. 3 (Winter, 1959), pp. 240-253 [JSTOR] cite
from p. 251 col 2.
"Since the 1920's, one popular procedure for combining musical
expression with interest in drugs was to make records or perform pieces
with thinly veiled references to narcotics in their titles:  Hophead,
Muggles, Reefer Song, Viper's Drag, Sweet Marijuana Brown, Weed Smoker's
Dream, Chant of the Weed, Pipe Dream Blues, Kicking the Gong Around,
You're a Viper, Reefer Man, Doctor Freeze, and Vonce, are among many
such titles, some of which achieved considerable success."

Wordcat shows 15 or so recordings with "Vonce" in the title.
Example:
Robert Ceely's album "Beep 1001: Instrumental and Electronic Music"
(1975) has a track called "Vonce, for Magnetic Tape".
The earliest track I can find that includes the word "vonce" in the
title is "Vonce #5" on Curtis Fuller's 1957 "New Trombone" album.

"Maestro Predicts New Movement to Pale 'Bob'" by Lionel Hampton
The Afro American
Tuesday, December 25, 1951 p. 6 col 3.
"A pretty girl is known as "Hollywood Eyes," her lips as "chops," and
you make love to her by "doin' the vonce vonce."