Green’s Dictionary of Slang

1. (Aus.) mad.

1890		Kipling ‘The Story of the Gadbsys’ in Soldiers Three (1907) 139: He has his leave all right, but he’s so dipped he can’t take it.
1918		C.J. Dennis ‘Half A Man’ in Chisholm (1951) 104: ’E looks at me like ’e thinks I’m dipped.

2. (US drugs) addicted to narcotics.

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