Green’s Dictionary of Slang

Valium, a mild tranquillizer.

1998		I. Welsh Filth 109: She remembers fuck all. Full of fuckin vallies or Prozac or whatever.
2000		N. Griffiths Grits 218: A find another Vally in me bottom drawer so a eat it an then soon thair’s sleep.
2004		P. Howard PS, I Scored the Bridesmaids 255: Sorcha’s throwing back vallies with the champagne to take the edge off her nerves.
2012		(con. 1980s) I. Welsh Skagboys 385: Ah stoap oaf in the bathroom tae swipe the auld girl’s Vallies.
2012		J. Fagan Panopticon (2013) 205: Now they’re giving her Valis and she’s stashing them up and popping them en masse.
2018		I. Welsh Dead Man’s Trousers 74: Just one solitary Ambien (and a Vallie).