Green’s Dictionary of Slang

AC/DC n.

1. (drugs) codeine-based cough syrup.

[UK]‘What Police Must Learn’ in Dly Teleg. 8 Nov. 🌐 AC/DC — codeine cough syrup.

2. (UK gay) a couple.

[UK]P. Baker Fabulosa 288/1: ac/dc 1. a couple.