Green’s Dictionary of Slang

1. a dismissive ‘V’ hand sign.

1973		(con. mid-1960s) J. Patrick Glasgow Gang Observed 106: The girls’ counter was a vigorous ‘vicky’ or ‘V’ sign.
2019		(con. 1973) A. Parks February’s Son 248: Mary threw him a vicky as her car passed, mouthed ‘You’re fucking dead, McCoy’.

2. a virgin.

1998

K. Sampson Awaydays 79: Did she tell yu she’s a Vicky?