In betting talk, “underneath” means using a horse in the non‑winning slots (2nd, 3rd, 4th, etc.) of an exotic wager like an exacta, trifecta, or superfecta.
Core meaning
- If someone says “I like the 3 on top and the 5 underneath,” they mean the 3 is their win horse, and the 5 is only being used for 2nd/3rd/4th in exotics.
- “Underneath” is basically the opposite of “on top,” which is the win position in exotics.
Where you'll hear it
- Exacta: “Key the 6 on top, spread underneath” = 6 must win; several others can be second.
- Trifecta: “Use the favorite underneath” = don't use the favorite to win, only for 2nd/3rd.
- Superfecta: “Bombs on top, chalk underneath” = longshots to win or early slots, short prices filling out the rest of the ticket.