Ace

Silas Kipley: "Beer?"

Agent Hahn: "No, thank you."

Silas Kipley: "What about whiskey? No? How 'bout some poly-sue or ace?"

— Silas Kipley offers Agent Hahn a number of substances upon the latter's visit to his home.

"Ace" is a slang term for a potent anti-anxiety agent. It is used predominantly on the human Outer Colony of Sedra, though the term has widespread usage throughout human-occupied space and can refer to a number of different drugs.^[1] "Ace" is commonly combined with polypseudomorphine for recreational usage.^[2]

List of appearances

Halo: Smoke and Shadow (First mentioned)

Sources

[1] Twitter, KellyHGay "no, since it's a prescription drug I envisioned it as more like a heavy anti-anxiety drug"

[2] Halo: Smoke and Shadow

[1]

[2]