go nap Definition

1. The card game napoleon.
2a. In that game: a call of five;
2b. In that game: the winning of five tricks.
3. horse-racing.
A tip that is claimed to be a certainty.

napped, napping
1. horse-racing.
To name (a particular horse) as certain to win.

To undertake to win all five tricks.

To risk all.