Green’s Dictionary of Slang

1. tipsy, slightly drunk [hit under the wing under hit adj.].

1933

‘William Juniper’ True Drunkard’s Delight 224: It is said that he is [...] wing’d.

2. (US drugs) addicted to cocaine [? play on fly v. (3)].

1959		J.E. Schmidt Narcotics Lingo and Lore.
1975		Hardy & Cull Drug Lang. and Lore.