0 happening only once: --
They gave him a one-shot payment to compensate for the extra hours that he had to work.
1 happening or possible only once: --
The tryouts are a one-shot deal, so you either you get the part or you don’t.
2 → one-off adjective --
NIEUWE WOORDEN
European
May 10, 2021
WOORD VAN DE DAG
Shimmer
one-shot