oncer

Etymology
or

Noun

 * 1)  A one-pound note.
 * 2)  A person who does something once.
 * 3)  A single sexual encounter between two individuals, a one-night stand.
 * 4)  A person with whom one shares a single sexual encounter, a one-night stand.
 * 1)  A single sexual encounter between two individuals, a one-night stand.
 * 2)  A person with whom one shares a single sexual encounter, a one-night stand.